State Cancer Profiles > Interpretation of Demographics Data

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Interpretation of Demographics Data

Demographic Data Report for Iowa by County
Population: Age under 18
All Races (includes Hispanic), Both Sexes
2020-2024 American Community Survey 5-Year Data
Sorted by Percent

United States

2023 Rural-Urban Continuum Codes Φ : N/A
Value (Percent) : The value is 22.0 percent.
People (Age Under 18) : The number of people (age under 18) is 73,517,834.
Rank within US : N/A

Iowa

2023 Rural-Urban Continuum Codes Φ : N/A
Value (Percent) : The value is 22.9 percent.
People (Age Under 18) : The number of people (age under 18) is 735,015.
Rank within US : This county is ranked 15 of 52

Story County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 16.2 percent.
People (Age Under 18) : The number of people (age under 18) is 16,276.
Rank within US : This county is ranked 2956 of 3143

Jefferson County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 17.1 percent.
People (Age Under 18) : The number of people (age under 18) is 2,692.
Rank within US : This county is ranked 2875 of 3143

Winneshiek County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 18.7 percent.
People (Age Under 18) : The number of people (age under 18) is 3,714.
Rank within US : This county is ranked 2601 of 3143

Hardin County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 19.0 percent.
People (Age Under 18) : The number of people (age under 18) is 3,157.
Rank within US : This county is ranked 2544 of 3143

Dickinson County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 19.1 percent.
People (Age Under 18) : The number of people (age under 18) is 3,429.
Rank within US : This county is ranked 2518 of 3143

Emmet County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 19.1 percent.
People (Age Under 18) : The number of people (age under 18) is 1,766.
Rank within US : This county is ranked 2518 of 3143

Page County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 19.2 percent.
People (Age Under 18) : The number of people (age under 18) is 2,906.
Rank within US : This county is ranked 2493 of 3143

Johnson County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 19.3 percent.
People (Age Under 18) : The number of people (age under 18) is 30,276.
Rank within US : This county is ranked 2459 of 3143

Poweshiek County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 19.4 percent.
People (Age Under 18) : The number of people (age under 18) is 3,593.
Rank within US : This county is ranked 2426 of 3143

Jones County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 20.2 percent.
People (Age Under 18) : The number of people (age under 18) is 4,212.
Rank within US : This county is ranked 2193 of 3143

Worth County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 20.7 percent.
People (Age Under 18) : The number of people (age under 18) is 1,520.
Rank within US : This county is ranked 2021 of 3143

Cerro Gordo County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 20.8 percent.
People (Age Under 18) : The number of people (age under 18) is 8,861.
Rank within US : This county is ranked 1978 of 3143

Henry County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 20.9 percent.
People (Age Under 18) : The number of people (age under 18) is 4,178.
Rank within US : This county is ranked 1936 of 3143

Boone County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 21.0 percent.
People (Age Under 18) : The number of people (age under 18) is 5,612.
Rank within US : This county is ranked 1910 of 3143

Hancock County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 21.0 percent.
People (Age Under 18) : The number of people (age under 18) is 2,243.
Rank within US : This county is ranked 1910 of 3143

Cedar County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 21.1 percent.
People (Age Under 18) : The number of people (age under 18) is 3,875.
Rank within US : This county is ranked 1869 of 3143

Winnebago County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 21.1 percent.
People (Age Under 18) : The number of people (age under 18) is 2,229.
Rank within US : This county is ranked 1869 of 3143

Guthrie County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 21.2 percent.
People (Age Under 18) : The number of people (age under 18) is 2,269.
Rank within US : This county is ranked 1816 of 3143

Lee County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 21.2 percent.
People (Age Under 18) : The number of people (age under 18) is 6,989.
Rank within US : This county is ranked 1816 of 3143

Fayette County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 21.4 percent.
People (Age Under 18) : The number of people (age under 18) is 4,123.
Rank within US : This county is ranked 1735 of 3143

Fremont County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 21.4 percent.
People (Age Under 18) : The number of people (age under 18) is 1,391.
Rank within US : This county is ranked 1735 of 3143

Webster County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 21.4 percent.
People (Age Under 18) : The number of people (age under 18) is 7,885.
Rank within US : This county is ranked 1735 of 3143

Appanoose County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 21.6 percent.
People (Age Under 18) : The number of people (age under 18) is 2,626.
Rank within US : This county is ranked 1650 of 3143

Audubon County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 21.6 percent.
People (Age Under 18) : The number of people (age under 18) is 1,210.
Rank within US : This county is ranked 1650 of 3143

Clayton County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 21.6 percent.
People (Age Under 18) : The number of people (age under 18) is 3,680.
Rank within US : This county is ranked 1650 of 3143

Calhoun County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 21.7 percent.
People (Age Under 18) : The number of people (age under 18) is 2,130.
Rank within US : This county is ranked 1613 of 3143

Greene County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 21.7 percent.
People (Age Under 18) : The number of people (age under 18) is 1,889.
Rank within US : This county is ranked 1613 of 3143

Sac County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 21.7 percent.
People (Age Under 18) : The number of people (age under 18) is 2,105.
Rank within US : This county is ranked 1613 of 3143

Black Hawk County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 21.9 percent.
People (Age Under 18) : The number of people (age under 18) is 28,744.
Rank within US : This county is ranked 1525 of 3143

Jasper County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 22.0 percent.
People (Age Under 18) : The number of people (age under 18) is 8,357.
Rank within US : This county is ranked 1478 of 3143

Kossuth County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 22.0 percent.
People (Age Under 18) : The number of people (age under 18) is 3,198.
Rank within US : This county is ranked 1478 of 3143

Louisa County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 22.0 percent.
People (Age Under 18) : The number of people (age under 18) is 2,347.
Rank within US : This county is ranked 1478 of 3143

Cherokee County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 22.2 percent.
People (Age Under 18) : The number of people (age under 18) is 2,575.
Rank within US : This county is ranked 1395 of 3143

Decatur County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 22.2 percent.
People (Age Under 18) : The number of people (age under 18) is 1,721.
Rank within US : This county is ranked 1395 of 3143

Des Moines County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 22.2 percent.
People (Age Under 18) : The number of people (age under 18) is 8,560.
Rank within US : This county is ranked 1395 of 3143

Jackson County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 22.2 percent.
People (Age Under 18) : The number of people (age under 18) is 4,303.
Rank within US : This county is ranked 1395 of 3143

Adams County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 22.3 percent.
People (Age Under 18) : The number of people (age under 18) is 806.
Rank within US : This county is ranked 1356 of 3143

Bremer County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 22.4 percent.
People (Age Under 18) : The number of people (age under 18) is 5,654.
Rank within US : This county is ranked 1311 of 3143

Butler County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 22.4 percent.
People (Age Under 18) : The number of people (age under 18) is 3,193.
Rank within US : This county is ranked 1311 of 3143

Keokuk County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 22.4 percent.
People (Age Under 18) : The number of people (age under 18) is 2,219.
Rank within US : This county is ranked 1311 of 3143

Ringgold County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 22.4 percent.
People (Age Under 18) : The number of people (age under 18) is 1,042.
Rank within US : This county is ranked 1311 of 3143

Dubuque County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 22.5 percent.
People (Age Under 18) : The number of people (age under 18) is 22,317.
Rank within US : This county is ranked 1260 of 3143

Linn County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 22.5 percent.
People (Age Under 18) : The number of people (age under 18) is 51,857.
Rank within US : This county is ranked 1260 of 3143

Union County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 22.5 percent.
People (Age Under 18) : The number of people (age under 18) is 2,697.
Rank within US : This county is ranked 1260 of 3143

Monona County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 22.6 percent.
People (Age Under 18) : The number of people (age under 18) is 1,935.
Rank within US : This county is ranked 1220 of 3143

Montgomery County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 22.6 percent.
People (Age Under 18) : The number of people (age under 18) is 2,307.
Rank within US : This county is ranked 1220 of 3143

Floyd County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 22.7 percent.
People (Age Under 18) : The number of people (age under 18) is 3,478.
Rank within US : This county is ranked 1174 of 3143

Osceola County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 22.7 percent.
People (Age Under 18) : The number of people (age under 18) is 1,383.
Rank within US : This county is ranked 1174 of 3143

Taylor County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 22.7 percent.
People (Age Under 18) : The number of people (age under 18) is 1,330.
Rank within US : This county is ranked 1174 of 3143

Mills County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 22.8 percent.
People (Age Under 18) : The number of people (age under 18) is 3,326.
Rank within US : This county is ranked 1133 of 3143

Adair County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 22.9 percent.
People (Age Under 18) : The number of people (age under 18) is 1,706.
Rank within US : This county is ranked 1096 of 3143

Benton County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 22.9 percent.
People (Age Under 18) : The number of people (age under 18) is 5,881.
Rank within US : This county is ranked 1096 of 3143

Clinton County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 22.9 percent.
People (Age Under 18) : The number of people (age under 18) is 10,582.
Rank within US : This county is ranked 1096 of 3143

Pottawattamie County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 22.9 percent.
People (Age Under 18) : The number of people (age under 18) is 21,407.
Rank within US : This county is ranked 1096 of 3143

Shelby County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 22.9 percent.
People (Age Under 18) : The number of people (age under 18) is 2,699.
Rank within US : This county is ranked 1096 of 3143

Monroe County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 23.0 percent.
People (Age Under 18) : The number of people (age under 18) is 1,731.
Rank within US : This county is ranked 1057 of 3143

Harrison County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 23.1 percent.
People (Age Under 18) : The number of people (age under 18) is 3,378.
Rank within US : This county is ranked 1006 of 3143

Marion County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 23.1 percent.
People (Age Under 18) : The number of people (age under 18) is 7,769.
Rank within US : This county is ranked 1006 of 3143

Palo Alto County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 23.1 percent.
People (Age Under 18) : The number of people (age under 18) is 2,044.
Rank within US : This county is ranked 1006 of 3143

Scott County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 23.1 percent.
People (Age Under 18) : The number of people (age under 18) is 40,411.
Rank within US : This county is ranked 1006 of 3143

Cass County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 23.2 percent.
People (Age Under 18) : The number of people (age under 18) is 3,035.
Rank within US : This county is ranked 962 of 3143

Chickasaw County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 23.2 percent.
People (Age Under 18) : The number of people (age under 18) is 2,743.
Rank within US : This county is ranked 962 of 3143

Clay County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 23.3 percent.
People (Age Under 18) : The number of people (age under 18) is 3,841.
Rank within US : This county is ranked 926 of 3143

Delaware County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 23.3 percent.
People (Age Under 18) : The number of people (age under 18) is 4,084.
Rank within US : This county is ranked 926 of 3143

Iowa County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 23.3 percent.
People (Age Under 18) : The number of people (age under 18) is 3,851.
Rank within US : This county is ranked 926 of 3143

Pocahontas County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 23.3 percent.
People (Age Under 18) : The number of people (age under 18) is 1,644.
Rank within US : This county is ranked 926 of 3143

Grundy County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 23.5 percent.
People (Age Under 18) : The number of people (age under 18) is 2,905.
Rank within US : This county is ranked 847 of 3143

Lucas County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 23.5 percent.
People (Age Under 18) : The number of people (age under 18) is 2,049.
Rank within US : This county is ranked 847 of 3143

Van Buren County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 23.6 percent.
People (Age Under 18) : The number of people (age under 18) is 1,709.
Rank within US : This county is ranked 809 of 3143

Humboldt County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 23.7 percent.
People (Age Under 18) : The number of people (age under 18) is 2,274.
Rank within US : This county is ranked 778 of 3143

Mahaska County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 23.7 percent.
People (Age Under 18) : The number of people (age under 18) is 5,213.
Rank within US : This county is ranked 778 of 3143

Tama County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 23.7 percent.
People (Age Under 18) : The number of people (age under 18) is 4,003.
Rank within US : This county is ranked 778 of 3143

Hamilton County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 23.8 percent.
People (Age Under 18) : The number of people (age under 18) is 3,547.
Rank within US : This county is ranked 748 of 3143

Mitchell County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 23.8 percent.
People (Age Under 18) : The number of people (age under 18) is 2,522.
Rank within US : This county is ranked 748 of 3143

Wapello County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 23.8 percent.
People (Age Under 18) : The number of people (age under 18) is 8,432.
Rank within US : This county is ranked 748 of 3143

Muscatine County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 23.9 percent.
People (Age Under 18) : The number of people (age under 18) is 10,171.
Rank within US : This county is ranked 717 of 3143

Franklin County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 24.1 percent.
People (Age Under 18) : The number of people (age under 18) is 2,396.
Rank within US : This county is ranked 657 of 3143

Ida County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 24.3 percent.
People (Age Under 18) : The number of people (age under 18) is 1,680.
Rank within US : This county is ranked 602 of 3143

Carroll County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 24.4 percent.
People (Age Under 18) : The number of people (age under 18) is 5,020.
Rank within US : This county is ranked 573 of 3143

O'Brien County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 24.4 percent.
People (Age Under 18) : The number of people (age under 18) is 3,446.
Rank within US : This county is ranked 573 of 3143

Polk County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 24.4 percent.
People (Age Under 18) : The number of people (age under 18) is 122,594.
Rank within US : This county is ranked 573 of 3143

Warren County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 24.4 percent.
People (Age Under 18) : The number of people (age under 18) is 13,292.
Rank within US : This county is ranked 573 of 3143

Allamakee County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 24.5 percent.
People (Age Under 18) : The number of people (age under 18) is 3,448.
Rank within US : This county is ranked 542 of 3143

Washington County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 24.5 percent.
People (Age Under 18) : The number of people (age under 18) is 5,533.
Rank within US : This county is ranked 542 of 3143

Plymouth County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 25.0 percent.
People (Age Under 18) : The number of people (age under 18) is 6,443.
Rank within US : This county is ranked 435 of 3143

Madison County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 25.2 percent.
People (Age Under 18) : The number of people (age under 18) is 4,258.
Rank within US : This county is ranked 385 of 3143

Buchanan County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 25.4 percent.
People (Age Under 18) : The number of people (age under 18) is 5,251.
Rank within US : This county is ranked 340 of 3143

Marshall County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 25.4 percent.
People (Age Under 18) : The number of people (age under 18) is 10,175.
Rank within US : This county is ranked 340 of 3143

Crawford County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 25.5 percent.
People (Age Under 18) : The number of people (age under 18) is 4,143.
Rank within US : This county is ranked 321 of 3143

Clarke County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 25.6 percent.
People (Age Under 18) : The number of people (age under 18) is 2,470.
Rank within US : This county is ranked 306 of 3143

Howard County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 25.8 percent.
People (Age Under 18) : The number of people (age under 18) is 2,441.
Rank within US : This county is ranked 280 of 3143

Woodbury County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 25.8 percent.
People (Age Under 18) : The number of people (age under 18) is 27,391.
Rank within US : This county is ranked 280 of 3143

Wayne County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 25.9 percent.
People (Age Under 18) : The number of people (age under 18) is 1,695.
Rank within US : This county is ranked 269 of 3143

Wright County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 26.0 percent.
People (Age Under 18) : The number of people (age under 18) is 3,329.
Rank within US : This county is ranked 255 of 3143

Buena Vista County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 26.6 percent.
People (Age Under 18) : The number of people (age under 18) is 5,519.
Rank within US : This county is ranked 203 of 3143

Dallas County

2023 Rural-Urban Continuum Codes Φ : Urban
Value (Percent) : The value is 26.6 percent.
People (Age Under 18) : The number of people (age under 18) is 28,676.
Rank within US : This county is ranked 203 of 3143

Sioux County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 27.2 percent.
People (Age Under 18) : The number of people (age under 18) is 9,837.
Rank within US : This county is ranked 165 of 3143

Lyon County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 28.2 percent.
People (Age Under 18) : The number of people (age under 18) is 3,425.
Rank within US : This county is ranked 126 of 3143

Davis County

2023 Rural-Urban Continuum Codes Φ : Rural
Value (Percent) : The value is 29.9 percent.
People (Age Under 18) : The number of people (age under 18) is 2,737.
Rank within US : This county is ranked 72 of 3143

Notes:
Created by statecancerprofiles.cancer.gov on 03/22/2026 10:35 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 under 18, see the dictionary.

Data for United States does not include Puerto Rico.

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