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Incidence Rates Table

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Incidence Rate Report for Montana by County

Breast (All Stages^), 2018-2022

All Races (includes Hispanic), Female, All Ages

Sorted by Recentaapc

County
sort alphabetically by name ascending 		2023 Rural-Urban Continuum Codes Φ
sort by rural urban descending 		Age-Adjusted Incidence Rate †
cases per 100,000
(95% Confidence Interval)
sort by rate descending 		CI*Rank ⋔
(95% Confidence Interval)
sort by CI rank descending 		Average Annual Count
sort by count descending 		Recent Trend
 Recent 5-Year Trend ‡ in Incidence Rates
(95% Confidence Interval)
sort by trend descending
Montana 2 N/A 137.5 (133.4, 141.7) N/A 955 rising rising trend 0.7 (0.3, 1.1)
US (SEER+NPCR) 1 N/A 131.3 (131.1, 131.6) N/A 270,245 rising rising trend 0.6 (0.5, 0.8)
Blaine County 2 Rural 94.8 (53.1, 155.6) 35 (3, 37) 3 falling falling trend -5.0 (-23.4, -0.7)
Roosevelt County 2 Rural 108.7 (71.0, 159.0) 31 (3, 37) 6 falling falling trend -3.1 (-6.6, -0.2)
Chouteau County 2 Rural 90.3 (50.5, 151.1) 36 (4, 37) 4 stable stable trend -2.1 (-7.5, 2.7)
Dawson County 2 Rural 151.2 (105.6, 210.7) 6 (1, 36) 8 stable stable trend -2.0 (-5.9, 1.5)
Teton County 2 Rural 123.7 (77.7, 188.6) 23 (1, 37) 5 stable stable trend -1.8 (-7.1, 3.4)
Cascade County 2 Urban 123.2 (109.4, 138.2) 26 (10, 32) 67 stable stable trend -1.6 (-11.9, 0.9)
Glacier County 2 Rural 120.2 (83.7, 166.6) 28 (2, 37) 8 stable stable trend -1.6 (-6.1, 2.4)
Fergus County 2 Rural 104.1 (73.6, 144.3) 33 (7, 37) 9 stable stable trend -0.8 (-4.6, 2.9)
Hill County 2 Rural 127.8 (94.7, 168.7) 21 (2, 36) 11 stable stable trend -0.7 (-3.2, 1.8)
Broadwater County 2 Urban 84.1 (50.8, 134.2) 37 (9, 37) 4 stable stable trend -0.6 (-4.7, 4.2)
Gallatin County 2 Urban 134.1 (120.5, 148.9) 15 (6, 28) 75 stable stable trend -0.6 (-1.6, 0.6)
Park County 2 Rural 123.4 (95.8, 157.5) 25 (3, 36) 16 stable stable trend -0.6 (-3.3, 2.2)
Pondera County 2 Rural 138.2 (85.2, 212.3) 11 (1, 37) 5 stable stable trend -0.6 (-3.8, 2.3)
Beaverhead County 2 Rural 113.1 (76.2, 163.0) 30 (2, 37) 7 stable stable trend -0.5 (-3.1, 2.2)
Lewis and Clark County 2 Urban 123.7 (108.9, 140.0) 24 (9, 33) 58 stable stable trend -0.3 (-1.6, 1.0)
Lincoln County 2 Rural 122.3 (96.2, 154.2) 27 (4, 36) 20 stable stable trend -0.1 (-2.5, 2.4)
Powell County 2 Rural 148.1 (96.2, 222.1) 8 (1, 36) 6 stable stable trend -0.1 (-4.4, 4.2)
Flathead County 2 Rural 140.1 (127.4, 153.8) 9 (5, 25) 101 stable stable trend 0.2 (-0.7, 1.3)
Richland County 2 Rural 107.7 (72.6, 154.1) 32 (4, 37) 6 stable stable trend 0.2 (-4.3, 4.9)
Silver Bow County 2 Rural 134.2 (111.9, 159.8) 14 (3, 32) 30 stable stable trend 0.6 (-1.9, 3.1)
Carbon County 2 Urban 132.8 (94.8, 182.7) 16 (1, 36) 10 stable stable trend 0.9 (-2.5, 4.8)
Deer Lodge County 2 Rural 96.7 (65.9, 140.6) 34 (9, 37) 8 stable stable trend 0.9 (-3.4, 5.5)
Phillips County 2 Rural 137.8 (77.9, 228.2) 12 (1, 37) 4 stable stable trend 0.9 (-4.0, 6.3)
Sanders County 2 Rural 124.5 (89.5, 170.1) 22 (1, 37) 12 stable stable trend 1.2 (-1.4, 4.1)
Lake County 2 Rural 168.2 (143.3, 196.5) 2 (1, 19) 39 stable stable trend 1.3 (-1.3, 4.2)
Ravalli County 2 Rural 136.9 (117.8, 158.6) 13 (4, 30) 47 stable stable trend 1.3 (-0.6, 3.3)
Jefferson County 2 Urban 130.9 (96.3, 175.3) 17 (1, 36) 12 stable stable trend 1.4 (-0.9, 4.0)
Missoula County 2 Urban 155.7 (142.1, 170.4) 5 (2, 17) 104 rising rising trend 1.4 (0.3, 2.7)
Stillwater County 2 Urban 186.9 (138.0, 249.0) 1 (1, 24) 12 stable stable trend 1.5 (-1.5, 4.9)
Madison County 2 Rural 117.9 (81.6, 168.2) 29 (2, 37) 9 stable stable trend 1.7 (-2.8, 7.3)
Big Horn County 2 Rural 138.3 (100.5, 185.6) 10 (1, 36) 10 stable stable trend 1.8 (-2.7, 7.1)
Yellowstone County 2 Urban 164.2 (153.0, 176.2) 3 (1, 12) 172 rising rising trend 2.0 (0.5, 3.7)
Valley County 2 Rural 128.4 (82.2, 191.6) 20 (1, 37) 6 stable stable trend 2.4 (-0.3, 5.3)
Rosebud County 2 Rural 159.0 (107.0, 227.1) 4 (1, 35) 7 stable stable trend 3.2 (-0.3, 7.4)
Custer County 2 Rural 150.3 (113.5, 196.3) 7 (1, 33) 13 rising rising trend 3.9 (0.1, 17.3)
Musselshell County 2 Rural 128.7 (81.0, 200.8) 19 (1, 37) 6 stable stable trend 4.0 (-0.1, 9.1)
Sweet Grass County 2 Rural 130.5 (76.5, 217.2) 18 (1, 37) 4
*
*
Carter County 2 Rural
*
*
3 or fewer
*
*
Daniels County 2 Rural
*
*
3 or fewer
*
*
Fallon County 2 Rural
*
*
3 or fewer
*
*
Garfield County 2 Rural
*
*
3 or fewer
*
*
Golden Valley County 2 Rural
*
*
3 or fewer
*
*
Granite County 2 Rural
*
*
3 or fewer
*
*
Judith Basin County 2 Rural
*
*
3 or fewer
*
*
Liberty County 2 Rural
*
*
3 or fewer
*
*
McCone County 2 Rural
*
*
3 or fewer
*
*
Meagher County 2 Rural
*
*
3 or fewer
*
*
Mineral County 2 Urban
*
*
3 or fewer
*
*
Petroleum County 2 Rural
*
*
3 or fewer
*
*
Powder River County 2 Rural
*
*
3 or fewer
*
*
Prairie County 2 Rural
*
*
3 or fewer
*
*
Sheridan County 2 Rural
*
*
3 or fewer
*
*
Toole County 2 Rural
*
*
3 or fewer
*
*
Treasure County 2 Rural
*
*
3 or fewer
*
*
Wheatland County 2 Rural
*
*
3 or fewer
*
*
Wibaux County 2 Rural
*
*
3 or fewer
*
*

Notes:
Created by statecancerprofiles.cancer.gov on 03/11/2026 5:34 pm.

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

Trend
Rising when 95% confidence interval of average annual percent change is above 0.
Stable when 95% confidence interval of average annual percent change includes 0.
Falling when 95% confidence interval of average annual percent change is below 0.


† 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.

‡ Incidence data come from different sources. The Average Annual Percent Change (AAPC) is based on the APCs calculated by Joinpoint. Due to data availability issues, the time period used in the calculation of the joinpoint regression model may differ for selected counties.

Rates and trends are computed using different standards for malignancy. For more information see malignant.html.

^ All Stages refers to any stage. 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.

⋔ Results presented with the CI*Rank statistics help show the usefulness of ranks. For example, ranks for relatively rare diseases or less populated areas may be essentially meaningless because of their large variability, but ranks for more common diseases in densely populated regions can be very useful. The rates used in CI*Rank are all age-adjusted to the 2000 US standard population using 19 age groups for SEER and NPCR areas. More information about methodology can be found on the CI*Rank website.

When displaying county information, the CI*Rank for the state is not shown because it's not comparable. To see the state CI*Rank please view the statistics at the US By State level.

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.

1 Source: National Program of Cancer Registries and Surveillance, Epidemiology, and End Results SEER*Stat Database - United States Department of Health and Human Services, Centers for Disease Control and Prevention and National Cancer Institute. Based on the 2024 submission.

2 Source: National Program of Cancer Registries SEER*Stat Database - United States Department of Health and Human Services, Centers for Disease Control and Prevention (based on the 2024 submission).

* 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.

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