State Cancer Profiles

Interpretation of Incidence Rates Data

Incidence Rate Report for Montana by County

Colon & Rectum (Late Stage^), 2018-2022

All Races (includes Hispanic), Both Sexes, Ages 50+

Sorted by CI*Rank

Explanation of Column Headers
Incidence Rate (95% Confidence Interval) - The incidence rate is based upon 100,000 people and is an annual rate (or average annual rate) based on the time period indicated. Rates are age-adjusted by 5-year age groups to the 2000 U.S. standard million population.

Percent of Cases with Late Stage - This is the number of late stages cases compared to the number of cases for all stages.

Other Notes

• Larger confidence intervals indicate less stability of the data. This is often due to low counts that are not quite low enough to be suppressed.
• Data is currently being suppressed if there are fewer than 16 counts for the time period.

Line by Line Interpretation of the Report

Montana²

• 2023 Rural-Urban Continuum Codes Φ : N/A
• Rate : The incidence rate is 66.6 with a 95% confidence interval from 63.0 to 70.2 and 280 average annual cases over 2018-2022.
• CI*Rank ⋔ : N/A

US (SEER+NPCR)¹

• 2023 Rural-Urban Continuum Codes Φ : N/A
• Rate : The incidence rate is 64.3 with a 95% confidence interval from 64.1 to 64.5 and 75,131 average annual cases over 2018-2022.
• CI*Rank ⋔ : N/A

Rosebud County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 165.1 with a 95% confidence interval from 102.0 to 251.9 and 4 average annual cases over 2018-2022.
• CI*Rank ⋔ : 1 (1, 12)
• Percent of Cases with Late Stage :

Roosevelt County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 159.4 with a 95% confidence interval from 97.6 to 245.2 and 4 average annual cases over 2018-2022.
• CI*Rank ⋔ : 2 (1, 11)
• Percent of Cases with Late Stage :

Musselshell County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 152.0 with a 95% confidence interval from 82.4 to 253.5 and 3 average annual cases over 2018-2022.
• CI*Rank ⋔ : 3 (1, 19)
• Percent of Cases with Late Stage :

Big Horn County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 126.8 with a 95% confidence interval from 79.7 to 191.5 and 5 average annual cases over 2018-2022.
• CI*Rank ⋔ : 4 (1, 18)
• Percent of Cases with Late Stage :

Powell County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 114.2 with a 95% confidence interval from 65.7 to 184.3 and 3 average annual cases over 2018-2022.
• CI*Rank ⋔ : 5 (1, 21)
• Percent of Cases with Late Stage :

Richland County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 103.5 with a 95% confidence interval from 61.8 to 162.3 and 4 average annual cases over 2018-2022.
• CI*Rank ⋔ : 6 (1, 22)
• Percent of Cases with Late Stage :

Stillwater County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 101.1 with a 95% confidence interval from 63.0 to 154.6 and 5 average annual cases over 2018-2022.
• CI*Rank ⋔ : 7 (2, 21)
• Percent of Cases with Late Stage :

Glacier County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 90.6 with a 95% confidence interval from 50.6 to 148.8 and 3 average annual cases over 2018-2022.
• CI*Rank ⋔ : 8 (2, 22)
• Percent of Cases with Late Stage :

Silver Bow County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 81.3 with a 95% confidence interval from 61.4 to 105.5 and 12 average annual cases over 2018-2022.
• CI*Rank ⋔ : 9 (5, 20)
• Percent of Cases with Late Stage :

Valley County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 80.6 with a 95% confidence interval from 45.7 to 133.5 and 3 average annual cases over 2018-2022.
• CI*Rank ⋔ : 10 (3, 22)
• Percent of Cases with Late Stage :

Custer County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 76.5 with a 95% confidence interval from 45.2 to 121.2 and 4 average annual cases over 2018-2022.
• CI*Rank ⋔ : 11 (3, 22)
• Percent of Cases with Late Stage :

Park County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 75.4 with a 95% confidence interval from 50.6 to 108.3 and 6 average annual cases over 2018-2022.
• CI*Rank ⋔ : 12 (4, 22)
• Percent of Cases with Late Stage :

Yellowstone County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 72.4 with a 95% confidence interval from 63.0 to 83.0 and 44 average annual cases over 2018-2022.
• CI*Rank ⋔ : 13 (7, 18)
• Percent of Cases with Late Stage :

Lewis and Clark County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 68.0 with a 95% confidence interval from 54.4 to 84.0 and 18 average annual cases over 2018-2022.
• CI*Rank ⋔ : 14 (7, 21)
• Percent of Cases with Late Stage :

Lincoln County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 65.2 with a 95% confidence interval from 45.8 to 90.5 and 8 average annual cases over 2018-2022.
• CI*Rank ⋔ : 15 (7, 22)
• Percent of Cases with Late Stage :

Flathead County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 62.2 with a 95% confidence interval from 51.5 to 74.4 and 25 average annual cases over 2018-2022.
• CI*Rank ⋔ : 16 (9, 22)
• Percent of Cases with Late Stage :

Cascade County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 61.0 with a 95% confidence interval from 49.2 to 74.7 and 20 average annual cases over 2018-2022.
• CI*Rank ⋔ : 17 (9, 22)
• Percent of Cases with Late Stage :

Lake County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 60.0 with a 95% confidence interval from 42.8 to 82.0 and 9 average annual cases over 2018-2022.
• CI*Rank ⋔ : 18 (8, 22)
• Percent of Cases with Late Stage :

Ravalli County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 57.4 with a 95% confidence interval from 43.8 to 74.0 and 13 average annual cases over 2018-2022.
• CI*Rank ⋔ : 19 (9, 22)
• Percent of Cases with Late Stage :

Missoula County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 54.9 with a 95% confidence interval from 44.5 to 66.9 and 20 average annual cases over 2018-2022.
• CI*Rank ⋔ : 20 (12, 22)
• Percent of Cases with Late Stage :

Gallatin County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 51.7 with a 95% confidence interval from 40.8 to 64.7 and 16 average annual cases over 2018-2022.
• CI*Rank ⋔ : 21 (13, 22)
• Percent of Cases with Late Stage :

Sanders County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 51.1 with a 95% confidence interval from 29.4 to 82.8 and 4 average annual cases over 2018-2022.
• CI*Rank ⋔ : 22 (8, 22)
• Percent of Cases with Late Stage :

Beaverhead County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Blaine County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Broadwater County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Carbon County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Carter County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Chouteau County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Daniels County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Dawson County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Deer Lodge County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Fallon County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Fergus County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Garfield County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Golden Valley County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Granite County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Hill County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Jefferson County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Judith Basin County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Liberty County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Madison County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

McCone County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Meagher County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Mineral County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Petroleum County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Phillips County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Pondera County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Powder River County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Prairie County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Sheridan County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Sweet Grass County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Teton County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Toole County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Treasure County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Wheatland County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Wibaux County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Notes:
Created by statecancerprofiles.cancer.gov on 03/25/2026 12:20 pm.

State Cancer Registries may provide more current or more local data.

† Incidence rates (cases per 100,000 population per year) are age-adjusted to the 2000 US standard population (SEER areas use 20 age groups and NPCR areas use 19 age groups). Rates are for invasive cancer only (except for bladder cancer which is invasive and in situ) or unless otherwise specified. Rates calculated using SEER*Stat. Population counts for denominators are based on Census populations as modified by NCI. The US Population Data File is used for SEER and NPCR incidence rates.

Rates are computed using cancers classified as malignant based on ICD-O-3. For more information see malignant.html.

^ Late Stage is defined as cases determined to be regional or distant. Due to changes in stage coding, Combined Summary Stage with Expanded Regional Codes (2004+) is used for data from Surveillance, Epidemiology, and End Results (SEER) databases and Merged Summary Stage is used for data from National Program of Cancer Registries databases. Due to the increased complexity with staging, other staging variables maybe used if necessary.

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: SEER and NPCR data. For more specific information please see the table.

* Data has been suppressed to ensure confidentiality and stability of rate estimates. Counts are suppressed if fewer than 16 records were reported in a specific area-sex-race category.

Data for United States does not include Puerto Rico.