Sheridan County, Montana Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 40th-largest in Montana
The population of Sheridan County, Montana is 3,677 as of the 2023 American Community Survey, making it the 40th-largest county in Montana. The median household income is $63,654, the median home value is $111,600, and the median age is 44.7.
The population of Sheridan County has grown 2.4% since 2010 (3,368 → 3,448), a +0.17% annualized rate.
3,677
Population
+0.17%
Annual growth
2
People / sq mi
$63,654
Median Income
$111,600
Median Home Value
Sheridan County covers 1,677 sq mi of land at 2.2 people per square mile.
About Sheridan County, MT
What distinguishes Sheridan County is density: among the most sparsely settled of US counties, around 2 people per square mile. Sheridan County is a county in Montana with a population of 3,677. It ranks #40 among counties in Montana by population.
Median household income is $63,654, below the US median of $78,538. Only 6.9% of residents live in poverty, below the national 12.4%. Housing is relatively affordable, with a median home value of $111,600, with typical rent around $749.
Degree attainment is mid-range for US counties: 24.7% of adults hold a four-year degree, below the national 35.0%. Most workers commute: only 4.0% work from home, below the national 14.0%, and the average commute runs about 14 minutes each way.
Sheridan County Population History (2010-2024)
The county of Sheridan County had a population of 3,368 in 2010 and 3,448 in 2024, a 2.4% growth over 14 years. The peak was 3,673 in 2015. Average annual growth rate: 0.20%.
3,448
Population (2024)
3,368
Population (2010)
3,673
Peak (2015)
0.20%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 3,368 |
| 2011 | 3,418 |
| 2012 | 3,549 |
| 2013 | 3,626 |
| 2014 | 3,661 |
| 2015 | 3,673 |
| 2016 | 3,609 |
| 2017 | 3,461 |
| 2018 | 3,379 |
| 2019 | 3,318 |
| 2020 | 3,536 |
| 2021 | 3,572 |
| 2022 | 3,550 |
| 2023 | 3,490 |
| 2024 | 3,448 |
Race & Ethnicity
| White | 92.2% |
| Black or African American | 0.0% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 4.3% |
| Two or More Races | 0.0% |
Age & Sex
44.7
Median Age
46.9%
Female
53.1%
Male
22.8%
Age 65+
Age Distribution
Children (under 15): 19.2% · Seniors (65+): 22.8%
Income & Poverty
| Median household income | $63,654$-6,268 vs state |
| Mean household income | $94,455 |
| Per-capita income | $41,202 |
| Poverty rate | 6.9%-0.2% vs state |
| Unemployment rate | 1.5% |
| Employment-to-population | 59.0% |
Top Industries by Employment
The largest employment sector in Sheridan County is agriculture, accounting for 23.5% of workers.
How residents commute
0.7%
Drive alone
8.8%
Carpool
71.1%
Public transit
4.0%
Work from home
14.2 min
Avg commute
Housing
$111,600$-226,500 vs state
Median home value
$749
Median rent
76.6%
Homeownership rate
2,049
Total housing units
71.7%
Occupied
28.3%
Vacant
23.4%
Renter-occupied
Social & access
90.4%
With health insurance
93.1%
With broadband internet
42.6%
Foreign-born
6.2%
Veterans (18+)
15.8%
With a disability
99.0%
Speak language other than English at home
Education
91.5%
High School+
24.7%
Bachelor's+
Largest cities in Montana
Other counties in Montana
Part of Montana
Metro areas in Montana
County rankings
Frequently Asked Questions
Sheridan County, Montana has a population of 3,677 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 40th-largest county in Montana. Population density is 2 people per square mile.
The population of Sheridan County has grown 2.4% since 2010 (3,368 → 3,448), a +0.17% annualized rate.
The median household income in Sheridan County, Montana is $63,654, with mean (average) household income of $94,455 and per-capita income of $41,202. 6.9% of residents live below the federal poverty level.
In Sheridan County, the largest racial and ethnic groups are White (92.2%), Hispanic or Latino (4.3%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Sheridan County, Montana is 44.7 years. Residents are 46.9% female and 53.1% male.
The median home value in Sheridan County is $111,600 and median monthly rent is $749. 76.6% of occupied housing units are owner-occupied. The county has 2,049 total housing units, 28.3% of which are vacant.
The largest employment sector in Sheridan County, Montana is agriculture, forestry, fishing, and mining, employing 23.5% of workers. The unemployment rate is 1.5%.
Billings is among the largest cities associated with Sheridan County, Montana, with a population of 118,321.
Sheridan County, MT Climate
Sheridan County, MT has an average annual temperature of 5.7°C (42°F) and receives about 331 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
5.7°C
Avg Temp
331
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -13° / 9° | 8 mm |
| February | -8° / 18° | 6 mm |
| March | -1° / 30° | 12 mm |
| April | 7° / 44° | 23 mm |
| May | 14° / 56° | 54 mm |
| June | 19° / 65° | 65 mm |
| July | 22° / 71° | 54 mm |
| August | 21° / 70° | 39 mm |
| September | 14° / 58° | 35 mm |
| October | 8° / 46° | 18 mm |
| November | -3° / 27° | 8 mm |
| December | -10° / 14° | 9 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Sheridan County, MT
The most comfortable months to visit Sheridan County, MT are typically August, July and June, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 30°C high). The coldest is January (near -19°C low). June is usually the wettest month.
Where to stay near Sheridan County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.