Town · Montana
Westby, Montana
Westby, town, in Sheridan County, Montana. Westby had 162 residents on July 1, 2025 by the Census Bureau's estimate, down 3.0% since 2020; the 2020 Census counted 167 and the ACS 2020-2024 5-year estimates put it at 290 (±81). GEOID 3078925.
Residents, July 2025 estimate
162
Census Bureau estimate (no margin published)
2020 Census count: 167 · ACS 2020-2024: 290 ±81
Median household income
$32,500
±$22,154 (90% margin)
Montana: $72,509
Median home value
$65,800
±$22,883 (90% margin)
Montana: $375,800
Median gross rent
$358
±$102 (90% margin)
Montana: $1,081
Where is Westby and what county is it in?
Westby is a town in Sheridan County, Montana. It covers 0.6 square miles of land, 297 residents per square mile in 2020.
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Westby, and is it growing?
The Census Bureau estimates that 162 people lived in Westby on July 1, 2025, down 3.0% since 2020, while Montana grew 5.6%. The 2020 Census counted 167 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 290 (±81).
| Measure | Westby | Sheridan County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 290 ±81 | 3,669 | +156 |
| Households | 104 ±29 | 1,476 | +39 |
| Average household size | 2.79 ±0.90 | 2.42 | no clear change |
| Housing units | 147 ±30 | 2,041 | no clear change |
Westby's population since 2000
From 172 in 2000 to 162 in 2025: down 5.8%. The 2000, 2010 and 2020 figures are census counts, each for Westby as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. 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); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Westby?
The median resident of Westby is 53.3 years old; 18.3% are under 18 and 17.9% are 65 or older. The largest group is non-Hispanic white residents at 98.6%, then non-Hispanic residents of two or more races at 1.4%.
| Measure | Westby | Sheridan County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 53.3 ±4.8 | 43.1 | no clear change |
| Under 18 years | 18.3% ±7.8 pts | 21.9% | – |
| 65 years and over | 17.9% ±8.4 pts | 22.7% | – |
| Male | 54.5% ±6.7 pts | 52.3% | – |
| Hispanic or Latino (any race) | 0.0% ±9.8 pts | 4.0% | – |
| White alone, not Hispanic | 98.6% ±1.8 pts | 88.2% | no clear change |
| Black or African American alone, not Hispanic | 0.0% ±9.8 pts | 0.0% | – |
| Asian alone, not Hispanic | 0.0% ±9.8 pts | 0.7% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±9.8 pts | 1.9% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±9.8 pts | 0.1% | – |
| Two or more races, not Hispanic | 1.4% ±1.8 pts | 4.9% | – |
| Some other race alone, not Hispanic | 0.0% ±9.8 pts | 0.2% | – |
| Born outside the United States | 0.0% ±9.8 pts | 2.7% | – |
| Speak a language other than English at home (age 5+) | 0.4% ±1.2 pts | 1.5% | – |
| Civilian veterans (age 18+) | 8.9% ±5.9 pts | 5.0% | – |
| With a disability | 14.8% ±7.4 pts | 15.3% | – |
| No health insurance coverage | 16.6% ±9.4 pts | 7.3% | – |
| High school graduate or higher (age 25+) | 92.5% ±6.0 pts | 90.7% | – |
| Bachelor's degree or higher (age 25+) | 18.0% ±6.5 pts | 26.2% | no clear change |
| Graduate or professional degree (age 25+) | 3.5% ±2.9 pts | 6.6% | – |
| Lived in the same house a year earlier | 97.6% ±3.2 pts | 93.4% | – |
| Moved from another state in the past year | 0.0% ±9.9 pts | 2.0% | – |
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 Westby earn?
Westby's median household income is published as $32,500 with a margin of ±$22,154, too wide to rely on.
| Measure | Westby | Sheridan County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $32,500 ±$22,154 | $70,147 | – |
| Mean household income | $52,099 ±$13,434 | $93,765 | – |
| Per capita income | $31,981 ±$7,204 | $40,043 | no clear change |
| People below the poverty line | 8.3% ±6.3 pts | 10.4% | – |
| Children under 18 below the poverty line | 7.5% ±10.1 pts | 12.4% | – |
| Households receiving SNAP | 4.8% ±5.2 pts | 4.2% | – |
| Households with a computer | 87.5% ±9.9 pts | 94.8% | – |
| Households with a broadband subscription | 84.6% ±11.3 pts | 89.0% | – |
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 Westby?
Owners occupy 89.4% of Westby's occupied homes and renters 10.6%. The median owner-occupied home is valued at $65,800 by its owner (±$22,883). The median renter pays $358 a month including utilities.
| Measure | Westby | Sheridan County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $65,800 ±$22,883 | $124,000 | −$51,116 |
| Median gross rent | $358 ±$102 | $746 | −$473 |
| Renters paying 35% or more of income on rent | 0.0% ±100.0 pts | 44.9% | – |
| Median monthly owner costs, with a mortgage | $983 ±$146 | $1,313 | – |
| Owner-occupied homes | 89.4% ±6.2 pts | 71.8% | +12.5 pts |
| Renter-occupied homes | 10.6% ±6.2 pts | 28.2% | – |
| Housing units | 147 ±30 | 2,041 | no clear change |
| Homeowner vacancy rate | 0.0% ±27.0 pts | 0.0% | – |
| Rental vacancy rate | 35.3% ±41.8 pts | 14.4% | – |
| Single-family detached homes | 72.1% ±11.8 pts | 76.4% | – |
| Mobile homes | 15.6% ±8.7 pts | 9.9% | – |
| Built 2020 or later | 0.0% ±18.4 pts | 0.2% | – |
| Built 2010 to 2019 | 3.4% ±3.7 pts | 6.1% | – |
| Built 1939 or earlier | 32.7% ±13.5 pts | 26.8% | – |
| Households with no vehicle | 1.9% ±2.6 pts | 5.2% | – |
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 do people in Westby work and get to work?
81.6% of Westby's workers drive alone. The average trip to work takes 15.2 minutes.
| Measure | Westby | Sheridan County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 58.1% ±15.9 pts | 62.6% | – |
| Unemployment rate | 2.9% ±3.8 pts | 2.1% | – |
| Drove alone to work | 81.6% ±15.5 pts | 64.8% | – |
| Carpooled | 3.7% ±3.4 pts | 14.3% | – |
| Public transportation | 0.0% ±19.7 pts | 3.8% | – |
| Walked | 14.7% ±15.1 pts | 9.0% | – |
| Worked from home | 0.0% ±19.7 pts | 5.2% | – |
| Mean travel time to work | 15.2 min ±4.5 | 13.2 min | no clear change |
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 census tracts are in Westby?
No census tract lies mostly in Westby; 1 tract reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 904Sheridan County | 1,113 | $74,861 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Westby) · Census block assignment files
How does Westby compare with other places in Montana?
By the Census Bureau's July 2025 estimates, Westby is the 17,102nd-most populous of the 19,476 U.S. incorporated places that have one and the 111th-most populous of 127 in Montana.
Westby is not ranked by income or the other survey measures: those rankings include places of 1,000 or more residents (2020 Census) with a reliable estimate.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 111th | 127 |
Westby's figures with every place in Montana (CSV)
Every place in Montana, sortable · Compare Westby with other places
Source: PlainCities ranks computed 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 reliable are the figures for Westby?
27 of the 57 figures for Westby on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
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 Westby 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' public schools in Westby.