City · Montana
Sidney, Montana
Sidney, city, in Richland County, Montana. Sidney had 6,217 residents on July 1, 2025 by the Census Bureau's estimate, down 1.9% since 2020; the 2020 Census counted 6,346 and the ACS 2020-2024 5-year estimates put it at 6,171 (±15). GEOID 3067900.
Residents, July 2025 estimate
6,217
Census Bureau estimate (no margin published)
2020 Census count: 6,346 · ACS 2020-2024: 6,171 ±15
Median household income
$62,538
±$13,627 (90% margin)
Montana: $72,509
Median home value
$236,900
±$19,665 (90% margin)
Montana: $375,800
Median gross rent
$931
±$65 (90% margin)
Montana: $1,081
Where is Sidney and what county is it in?
Sidney is a city in Richland County, Montana. It covers 3.3 square miles of land, 1,931 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 Sidney, and is it growing?
The Census Bureau estimates that 6,217 people lived in Sidney on July 1, 2025, down 1.9% since 2020, while Montana grew 5.6%. The 2020 Census counted 6,346 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 6,171 (±15).
| Measure | Sidney | Richland County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 6,171 ±15 | 11,235 | −245 |
| Households | 2,505 ±214 | 4,422 | no clear change |
| Average household size | 2.44 ±0.21 | 2.53 | no clear change |
| Housing units | 3,198 ±154 | 5,610 | no clear change |
Sidney's population since 2000
From 4,774 in 2000 to 6,217 in 2025: up 30.2%. The 2000, 2010 and 2020 figures are census counts, each for Sidney 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 Sidney?
The median resident of Sidney is 37.3 years old; 25.3% are under 18 and 13.6% are 65 or older. The largest group is non-Hispanic white residents at 83.8%, then Hispanic or Latino residents (of any race) at 8.0%. 3.2% of residents were born outside the United States.
| Measure | Sidney | Richland County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 37.3 ±3.1 | 38.4 | no clear change |
| Under 18 years | 25.3% ±2.8 pts | 24.9% | – |
| 65 years and over | 13.6% ±2.6 pts | 17.5% | – |
| Male | 48.7% ±2.5 pts | 50.8% | – |
| Hispanic or Latino (any race) | 8.0% ±1.3 pts | 5.5% | no clear change |
| White alone, not Hispanic | 83.8% ±2.5 pts | 87.5% | no clear change |
| Black or African American alone, not Hispanic | 0.0% ±0.5 pts | 0.3% | – |
| Asian alone, not Hispanic | 0.2% ±0.4 pts | 0.4% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.1% ±0.1 pts | 0.2% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 1.0% ±0.5 pts | 0.5% | – |
| Two or more races, not Hispanic | 6.8% ±2.3 pts | 5.3% | – |
| Some other race alone, not Hispanic | 0.0% ±0.5 pts | 0.3% | – |
| Born outside the United States | 3.2% ±1.2 pts | 3.1% | – |
| Speak a language other than English at home (age 5+) | 4.4% ±1.8 pts | 3.7% | – |
| Civilian veterans (age 18+) | 4.9% ±1.8 pts | 5.7% | – |
| With a disability | 11.1% ±3.3 pts | 11.9% | – |
| No health insurance coverage | 5.0% ±3.3 pts | 4.7% | – |
| High school graduate or higher (age 25+) | 94.7% ±2.4 pts | 95.0% | – |
| Bachelor's degree or higher (age 25+) | 22.0% ±5.6 pts | 22.0% | no clear change |
| Graduate or professional degree (age 25+) | 3.9% ±2.4 pts | 4.1% | – |
| Lived in the same house a year earlier | 88.7% ±3.9 pts | 91.3% | – |
| Moved from another state in the past year | 3.5% ±2.3 pts | 2.1% | – |
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 Sidney earn?
Half of Sidney's 2,505 households earn less than $62,538 a year (±$13,627), against $73,084 in Richland County and $72,509 in Montana. In 2015-2019 it was $72,765 in 2024 dollars; the margins of error cannot tell the two periods apart. 7.7% of residents live below the poverty line.
| Measure | Sidney | Richland County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $62,538 ±$13,627 | $73,084 | no clear change |
| Mean household income | $110,270 ±$19,126 | $103,609 | – |
| Per capita income | $45,385 ±$7,383 | $41,554 | no clear change |
| People below the poverty line | 7.7% ±3.4 pts | 6.6% | no clear change |
| Children under 18 below the poverty line | 6.4% ±4.7 pts | 5.0% | – |
| Households receiving SNAP | 4.4% ±2.1 pts | 4.4% | – |
| Households with a computer | 96.1% ±2.2 pts | 92.2% | – |
| Households with a broadband subscription | 88.2% ±4.8 pts | 85.8% | – |
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 Sidney?
Owners occupy 57.6% of Sidney's occupied homes and renters 42.4%. The median owner-occupied home is valued at $236,900 by its owner (±$19,665). The median renter pays $931 a month including utilities, and 21.4% of renters pay 35% or more of their income on rent.
| Measure | Sidney | Richland County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $236,900 ±$19,665 | $263,000 | −$50,836 |
| Median gross rent | $931 ±$65 | $917 | no clear change |
| Renters paying 35% or more of income on rent | 21.4% ±10.4 pts | 20.1% | no clear change |
| Median monthly owner costs, with a mortgage | $1,825 ±$170 | $1,860 | – |
| Owner-occupied homes | 57.6% ±6.2 pts | 67.1% | no clear change |
| Renter-occupied homes | 42.4% ±6.2 pts | 32.9% | – |
| Housing units | 3,198 ±154 | 5,610 | no clear change |
| Homeowner vacancy rate | 5.6% ±5.8 pts | 2.8% | – |
| Rental vacancy rate | 9.9% ±8.0 pts | 9.4% | – |
| Single-family detached homes | 56.3% ±6.1 pts | 62.6% | – |
| Mobile homes | 12.6% ±4.4 pts | 16.7% | – |
| Built 2020 or later | 0.6% ±0.9 pts | 0.7% | – |
| Built 2010 to 2019 | 21.8% ±6.3 pts | 19.8% | – |
| Built 1939 or earlier | 9.6% ±4.0 pts | 10.8% | – |
| Households with no vehicle | 6.2% ±3.3 pts | 5.1% | – |
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 Sidney building?
Builders took permits for 0 new housing units in Sidney in 2025 (0 in single-family houses), 0.0 per 1,000 residents against 4.6 across Montana.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Sidney work and get to work?
79.5% of Sidney's workers drive alone. The average trip to work takes 21.2 minutes. The unemployment rate in 2020-2024 averaged 3.4%.
| Measure | Sidney | Richland County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 73.2% ±4.7 pts | 68.7% | – |
| Unemployment rate | 3.4% ±1.5 pts | 3.3% | – |
| Drove alone to work | 79.5% ±6.6 pts | 73.2% | – |
| Carpooled | 10.7% ±5.0 pts | 11.5% | – |
| Public transportation | 0.0% ±0.9 pts | 0.0% | – |
| Walked | 6.3% ±3.6 pts | 8.9% | – |
| Worked from home | 1.9% ±1.7 pts | 5.4% | – |
| Mean travel time to work | 21.2 min ±3.1 | 22.7 min | +6.8 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 census tracts are in Sidney?
3 census tracts lie mostly in Sidney (2020 census blocks). Their median household incomes run from $63,561 (Tract 703.01) to $70,625 (Tract 704).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 704Richland County | 3,163 | $70,625 |
| Tract 703.01Richland County | 2,665 | $63,561 |
| Tract 703.02Richland County | 1,900 | not published |
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 Sidney) · Census block assignment files
How does Sidney compare with other places in Montana?
By the Census Bureau's July 2025 estimates, Sidney is the 4,338th-most populous of the 19,476 U.S. incorporated places that have one and the 15th-most populous of 127 in Montana.
Sidney ranks 51st of 90 places in Montana with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 15th | 127 |
| Growth 2020-2025 (PEP) | 44th | 53 |
| Residents per square mile | 19th | 93 |
| Median household income | 51st | 90 |
| Per capita income | 18th | 93 |
| Median home value | 54th | 89 |
| Median gross rent | 44th | 82 |
| Poverty rate | 54th | 65 |
| Bachelor's degree or higher | 61st | 90 |
| Median age | 63rd | 93 |
| Owner-occupied share | 71st | 92 |
| Travel time to work | 26th | 93 |
Sidney's figures with every place in Montana (CSV)
Every place in Montana, sortable · Compare Sidney 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 Sidney?
11 of the 57 figures for Sidney 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 Sidney 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 Sidney.