State Cancer Profiles

Interpretation of Demographics Data

Demographic Data Report for Illinois by County
Population: Age 40 and over
All Races (includes Hispanic), Both Sexes
2020-2024 American Community Survey 5-Year Data
Sorted by Percent

Illinois

• 2023 Rural-Urban Continuum Codes Φ : N/A
• Value (Percent) : The value is 48.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 6,180,674.
• Rank within US : This county is ranked 29 of 52

United States

• 2023 Rural-Urban Continuum Codes Φ : N/A
• Value (Percent) : The value is 48.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 162,458,898.
• Rank within US : N/A

Hardin County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 62.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 2,253.
• Rank within US : This county is ranked 151 of 3143

Pope County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 69.4 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 2,596.
• Rank within US : This county is ranked 25 of 3143

Calhoun County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 61.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 2,664.
• Rank within US : This county is ranked 192 of 3143

Pulaski County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 54.2 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 2,719.
• Rank within US : This county is ranked 1019 of 3143

Gallatin County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 57.0 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 2,749.
• Rank within US : This county is ranked 566 of 3143

Scott County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 57.6 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 2,846.
• Rank within US : This county is ranked 484 of 3143

Stark County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 54.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 2,906.
• Rank within US : This county is ranked 909 of 3143

Alexander County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 60.0 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 2,923.
• Rank within US : This county is ranked 267 of 3143

Putnam County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 57.4 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 3,213.
• Rank within US : This county is ranked 515 of 3143

Brown County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 51.8 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 3,273.
• Rank within US : This county is ranked 1593 of 3143

Edwards County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 56.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 3,447.
• Rank within US : This county is ranked 595 of 3143

Henderson County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 60.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 3,762.
• Rank within US : This county is ranked 232 of 3143

Schuyler County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 62.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 4,241.
• Rank within US : This county is ranked 151 of 3143

Hamilton County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 55.0 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 4,354.
• Rank within US : This county is ranked 853 of 3143

Jasper County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 55.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 5,091.
• Rank within US : This county is ranked 766 of 3143

Cumberland County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 53.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 5,550.
• Rank within US : This county is ranked 1138 of 3143

Wabash County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 54.0 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 6,003.
• Rank within US : This county is ranked 1065 of 3143

Cass County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 47.9 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 6,121.
• Rank within US : This county is ranked 2429 of 3143

Greene County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 54.4 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 6,359.
• Rank within US : This county is ranked 971 of 3143

Menard County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 53.8 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 6,511.
• Rank within US : This county is ranked 1103 of 3143

Clay County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 50.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 6,594.
• Rank within US : This county is ranked 1912 of 3143

Marshall County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 56.8 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 6,610.
• Rank within US : This county is ranked 587 of 3143

Ford County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 51.6 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 6,918.
• Rank within US : This county is ranked 1641 of 3143

Johnson County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 52.6 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 7,039.
• Rank within US : This county is ranked 1379 of 3143

Mason County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 55.3 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 7,049.
• Rank within US : This county is ranked 799 of 3143

Moultrie County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 50.2 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 7,234.
• Rank within US : This county is ranked 1983 of 3143

Washington County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 54.2 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 7,383.
• Rank within US : This county is ranked 1019 of 3143

White County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 55.0 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 7,495.
• Rank within US : This county is ranked 853 of 3143

Pike County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 52.8 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 7,645.
• Rank within US : This county is ranked 1325 of 3143

Lawrence County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 51.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 7,772.
• Rank within US : This county is ranked 1616 of 3143

Massac County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 56.2 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 7,795.
• Rank within US : This county is ranked 652 of 3143

Warren County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 48.8 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 8,022.
• Rank within US : This county is ranked 2287 of 3143

Clark County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 52.9 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 8,070.
• Rank within US : This county is ranked 1302 of 3143

Bond County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 49.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 8,274.
• Rank within US : This county is ranked 2137 of 3143

Richland County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 53.4 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 8,322.
• Rank within US : This county is ranked 1205 of 3143

De Witt County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 55.3 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 8,507.
• Rank within US : This county is ranked 799 of 3143

Mercer County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 55.9 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 8,666.
• Rank within US : This county is ranked 695 of 3143

Wayne County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 54.3 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 8,679.
• Rank within US : This county is ranked 993 of 3143

Piatt County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 53.2 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 8,886.
• Rank within US : This county is ranked 1245 of 3143

Carroll County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 57.3 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 8,923.
• Rank within US : This county is ranked 527 of 3143

Union County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 55.2 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 9,379.
• Rank within US : This county is ranked 824 of 3143

Douglas County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 47.8 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 9,436.
• Rank within US : This county is ranked 2442 of 3143

Edgar County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 58.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 9,672.
• Rank within US : This county is ranked 389 of 3143

Hancock County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 56.6 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 9,784.
• Rank within US : This county is ranked 609 of 3143

Crawford County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 53.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 9,947.
• Rank within US : This county is ranked 1138 of 3143

Perry County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 52.8 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 10,905.
• Rank within US : This county is ranked 1325 of 3143

Fayette County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 52.3 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 11,143.
• Rank within US : This county is ranked 1461 of 3143

Jersey County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 53.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 11,430.
• Rank within US : This county is ranked 1138 of 3143

Shelby County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 55.3 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 11,453.
• Rank within US : This county is ranked 799 of 3143

McDonough County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 44.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 12,040.
• Rank within US : This county is ranked 2794 of 3143

Saline County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 53.3 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 12,371.
• Rank within US : This county is ranked 1225 of 3143

Jo Daviess County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 61.1 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 13,344.
• Rank within US : This county is ranked 210 of 3143

Logan County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 51.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 14,273.
• Rank within US : This county is ranked 1669 of 3143

Iroquois County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 55.4 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 14,652.
• Rank within US : This county is ranked 781 of 3143

Montgomery County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 53.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 14,999.
• Rank within US : This county is ranked 1138 of 3143

Randolph County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 55.0 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 16,529.
• Rank within US : This county is ranked 853 of 3143

Morgan County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 51.8 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 17,105.
• Rank within US : This county is ranked 1593 of 3143

Effingham County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 50.0 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 17,245.
• Rank within US : This county is ranked 2034 of 3143

Bureau County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 54.9 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 18,047.
• Rank within US : This county is ranked 869 of 3143

Christian County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 53.8 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 18,049.
• Rank within US : This county is ranked 1103 of 3143

Fulton County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 55.0 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 18,164.
• Rank within US : This county is ranked 853 of 3143

Lee County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 54.0 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 18,297.
• Rank within US : This county is ranked 1065 of 3143

Livingston County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 52.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 18,667.
• Rank within US : This county is ranked 1412 of 3143

Jefferson County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 51.4 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 18,783.
• Rank within US : This county is ranked 1691 of 3143

Monroe County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 54.1 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 18,943.
• Rank within US : This county is ranked 1045 of 3143

Clinton County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 51.9 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 19,191.
• Rank within US : This county is ranked 1570 of 3143

Marion County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 52.0 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 19,251.
• Rank within US : This county is ranked 1544 of 3143

Woodford County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 50.6 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 19,376.
• Rank within US : This county is ranked 1884 of 3143

Franklin County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 53.9 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 20,100.
• Rank within US : This county is ranked 1083 of 3143

Jackson County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 41.3 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 21,890.
• Rank within US : This county is ranked 2976 of 3143

Coles County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 47.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 22,200.
• Rank within US : This county is ranked 2485 of 3143

Stephenson County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 55.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 24,397.
• Rank within US : This county is ranked 738 of 3143

Macoupin County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 55.3 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 24,527.
• Rank within US : This county is ranked 799 of 3143

Grundy County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 47.3 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 25,183.
• Rank within US : This county is ranked 2512 of 3143

Knox County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 53.4 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 26,212.
• Rank within US : This county is ranked 1205 of 3143

Boone County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 49.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 26,461.
• Rank within US : This county is ranked 2095 of 3143

Henry County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 54.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 26,499.
• Rank within US : This county is ranked 952 of 3143

Ogle County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 52.6 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 27,090.
• Rank within US : This county is ranked 1379 of 3143

Whiteside County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 53.1 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 29,194.
• Rank within US : This county is ranked 1267 of 3143

Adams County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 52.1 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 33,729.
• Rank within US : This county is ranked 1510 of 3143

Williamson County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 52.1 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 34,872.
• Rank within US : This county is ranked 1510 of 3143

Vermilion County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 51.8 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 37,525.
• Rank within US : This county is ranked 1593 of 3143

DeKalb County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 40.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 40,948.
• Rank within US : This county is ranked 3003 of 3143

Macon County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 50.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 51,641.
• Rank within US : This county is ranked 1858 of 3143

Kankakee County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 49.1 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 52,324.
• Rank within US : This county is ranked 2239 of 3143

La Salle County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 52.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 57,297.
• Rank within US : This county is ranked 1344 of 3143

Kendall County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 44.6 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 61,384.
• Rank within US : This county is ranked 2797 of 3143

Tazewell County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 52.6 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 68,516.
• Rank within US : This county is ranked 1379 of 3143

Rock Island County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 50.3 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 71,869.
• Rank within US : This county is ranked 1962 of 3143

McLean County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 42.9 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 73,534.
• Rank within US : This county is ranked 2911 of 3143

Champaign County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 38.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 80,798.
• Rank within US : This county is ranked 3067 of 3143

Peoria County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 47.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 85,619.
• Rank within US : This county is ranked 2458 of 3143

Sangamon County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 51.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 100,461.
• Rank within US : This county is ranked 1669 of 3143

St. Clair County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 49.8 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 126,439.
• Rank within US : This county is ranked 2079 of 3143

Madison County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 50.3 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 132,795.
• Rank within US : This county is ranked 1962 of 3143

Winnebago County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 49.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 140,260.
• Rank within US : This county is ranked 2137 of 3143

McHenry County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 50.8 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 158,952.
• Rank within US : This county is ranked 1836 of 3143

Kane County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 48.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 250,897.
• Rank within US : This county is ranked 2339 of 3143

Will County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 48.8 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 342,075.
• Rank within US : This county is ranked 2287 of 3143

Lake County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 48.8 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 348,668.
• Rank within US : This county is ranked 2287 of 3143

DuPage County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 50.2 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 467,233.
• Rank within US : This county is ranked 1983 of 3143

Cook County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 47.1 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 2,441,146.
• Rank within US : This county is ranked 2541 of 3143

Notes:
Created by statecancerprofiles.cancer.gov on 03/24/2026 8:12 am.

Φ Rural–urban county classifications are based on the 2023 USDA Rural–Urban Continuum Codes (except for Connecticut Counties which use 2013 codes). State-level cancer rates for rural areas are calculated using cancer cases registered exclusively in rural counties, while state-level cancer rates for urban areas are calculated using cases registered exclusively in urban counties.

Source: Demographic data provided by the Census Bureau and the American Community Survey.

For more information about Population: Age 40 and over, see the dictionary.

Data for United States does not include Puerto Rico.