County · Montana
Sheridan County, Montana
Sheridan County, Montana. Sheridan County had 3,436 residents in 2025 by the Census Bureau's estimate, down 3.1% since 2020, while Montana grew 5.6%. It holds 8 places (4 cities, villages and boroughs and 4 census-designated) and 2 census tracts. GEOID 30091.
Residents, July 2025 estimate
3,436
Census Bureau estimate (no margin published)
2020 Census count: 3,539 · ACS 2020-2024: 3,669 ±188
Median household income
$70,147
±$15,093 (90% margin)
Montana: $72,509
Median home value
$124,000
±$20,717 (90% margin)
Montana: $375,800
Median gross rent
$746
±$60 (90% margin)
Montana: $1,081
How many people live in Sheridan County, and is it growing?
The 2020 Census counted 3,539 residents in Sheridan County. The Census Bureau estimates 3,436 for July 1, 2025, down 3.1% since 2020, while Montana grew 5.6%. The 2020-2024 American Community Survey puts the population at 3,669 over 1,677 square miles of land.
| Measure | Sheridan County | Montana | Change since 2015-2019 |
|---|---|---|---|
| Total population | 3,669±188 | 1,116,875 | no clear change |
| Households | 1,476±100 | 458,859 | −163 |
| Average household size | 2.42±0.16 | 2.37 | +0.35 |
| Housing units | 2,041±78 | 528,419 | −120 |
Sheridan County's population since 2000
From 4,105 in 2000 to 3,436 in 2025: down 16.3%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov
What cities and towns are in Sheridan County?
Sheridan County holds 8 places: 4 cities, villages and boroughs (incorporated places) and 4 census-designated places. The largest is Plentywood with 1,619 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Plentywood | 1,669 | $68,438 |
|---|---|---|
| Medicine Lake | 244 | $48,125 |
| Westby | 167 | $32,500 |
| OutlookGEOID 3056050 | 84 | $58,125 |
| AntelopeGEOID 3002050 | 74 | not published |
| HomesteadGEOID 3037450 | 35 | $162,500 |
| ReserveGEOID 3062125 | 33 | $53,750 |
| RedstoneGEOID 3061675 | 13 | not published |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov
Who lives in Sheridan County?
The median resident of Sheridan County is 43.1 years old; 21.9% are under 18 and 22.7% are 65 or older. The largest group is non-Hispanic white residents at 88.2%, then non-Hispanic residents of two or more races at 4.9%. 2.7% of residents were born outside the United States.
| Measure | Sheridan County | Montana | Change since 2015-2019 |
|---|---|---|---|
| Median age | 43.1±2.0 | 40.4 | no clear change |
| Under 18 years | 21.9%±1.5 pts | 21.0% | – |
| 65 years and over | 22.7%±1.5 pts | 20.1% | – |
| Hispanic or Latino (any race) | 4.0%±1.0 pts | 4.6% | no clear change |
| White alone, not Hispanic | 88.2%±1.2 pts | 83.6% | −2.9 pts |
| Black or African American alone, not Hispanic | 0.0%±0.8 pts | 0.4% | – |
| Asian alone, not Hispanic | 0.7%±0.4 pts | 0.8% | – |
| American Indian and Alaska Native alone, not Hispanic | 1.9%±1.3 pts | 5.3% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.1%±0.4 pts | 0.0% | – |
| Two or more races, not Hispanic | 4.9%±1.5 pts | 4.7% | – |
| Some other race alone, not Hispanic | 0.2%±0.3 pts | 0.5% | – |
| Born outside the United States | 2.7%±1.1 pts | 2.3% | no clear change |
| Speak a language other than English at home (age 5+) | 1.5%±0.9 pts | 4.2% | – |
| Civilian veterans (age 18+) | 5.0%±1.6 pts | 9.0% | – |
| With a disability | 15.3%±2.7 pts | 14.5% | – |
| No health insurance coverage | 7.3%±2.3 pts | 8.6% | no clear change |
| High school graduate or higher (age 25+) | 90.7%±3.7 pts | 94.6% | – |
| Bachelor's degree or higher (age 25+) | 26.2%±4.4 pts | 35.2% | no clear change |
| Graduate or professional degree (age 25+) | 6.6%±2.2 pts | 12.0% | – |
| Moved from another state in the past year | 2.0%±1.1 pts | 3.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Sheridan County earn?
Half of Sheridan County's 1,476 households earn less than $70,147 a year (±$15,093), against $72,509 in Montana. In 2015-2019 it was $68,329 in 2024 dollars; the margins of error cannot tell the two periods apart. 10.4% of residents live below the poverty line.
| Measure | Sheridan County | Montana | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $70,147±$15,093 | $72,509 | no clear change |
| Mean household income | $93,765±$9,964 | $98,908 | – |
| Per capita income | $40,043±$3,237 | $41,711 | no clear change |
| People below the poverty line | 10.4%±3.3 pts | 11.5% | no clear change |
| Children under 18 below the poverty line | 12.4%±6.1 pts | 12.7% | no clear change |
| Households receiving SNAP | 4.2%±2.3 pts | 7.8% | – |
| Households with a broadband subscription | 89.0%±3.7 pts | 89.4% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Sheridan County?
Owners occupy 71.8% of Sheridan County's occupied homes and renters 28.2%. The median owner-occupied home is valued at $124,000 by its owner (±$20,717). The median renter pays $746 a month including utilities, and 44.9% of renters pay 35% or more of their income on rent.
| Measure | Sheridan County | Montana | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $124,000±$20,717 | $375,800 | −$32,913 |
| Median gross rent | $746±$60 | $1,081 | −$149 |
| Renters paying 35% or more of income on rent | 44.9%±14.2 pts | 35.5% | no clear change |
| Median monthly owner costs, with a mortgage | $1,313±$109 | $1,798 | – |
| Owner-occupied homes | 71.8%±5.4 pts | 69.2% | −7.0 pts |
| Housing units | 2,041±78 | 528,419 | −120 |
| Homeowner vacancy rate | 0.0%±2.8 pts | 0.9% | – |
| Rental vacancy rate | 14.4%±9.2 pts | 5.3% | – |
| Single-family detached homes | 76.4%±5.0 pts | 68.8% | – |
| Mobile homes | 9.9%±2.7 pts | 9.4% | – |
| Built 2020 or later | 0.2%±0.3 pts | 2.3% | – |
| Built 1939 or earlier | 26.8%±5.2 pts | 12.8% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Sheridan County building?
Builders took permits for 0 new housing units across Sheridan County in 2025 (0 single-family), 0.0 per 1,000 residents.
Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Sheridan County get to work?
64.8% of Sheridan County's workers drive alone and 5.2% work from home. The average trip to work takes 13.2 minutes.
| Measure | Sheridan County | Montana | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 62.6%±3.7 pts | 62.9% | – |
| Unemployment rate | 2.1%±1.6 pts | 3.6% | – |
| Drove alone to work | 64.8%±7.1 pts | 71.1% | – |
| Carpooled | 14.3%±3.9 pts | 9.7% | – |
| Public transportation | 3.8%±5.0 pts | 0.6% | – |
| Walked | 9.0%±3.9 pts | 3.9% | – |
| Worked from home | 5.2%±1.9 pts | 12.5% | −4.1 pts |
| Mean travel time to work | 13.2 min±1.7 | 19.1 min | −4.0 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What are Sheridan County's census tracts?
Sheridan County is divided into 2 census tracts. Among those with a reliable estimate, median household income runs from $67,656 (Tract 902) to $74,861 (Tract 904).
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Sheridan County compare with Montana's other counties?
| Measure | Rank |
|---|---|
| Population | 40th of 56 |
| Growth 2020-2025 | 53rd of 56 |
| Residents per square mile | 33rd of 56 |
| Median household income | 20th of 56 |
| Median home value | 54th of 56 |
| Median gross rent | 38th of 56 |
| Poverty rate | 37th of 56 |
| Bachelor's degree or higher | 26th of 56 |
| Median age | 33rd of 56 |
Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Sheridan County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.