Population 9,182 · Census ACS 2020–24
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Population and households in Stillwater County
Household size in Stillwater County
| Period | Stillwater County | Montana | U.S. |
|---|---|---|---|
| 2006–10 | 2.39 | 2.41 | 2.68 |
| 2010–14 | 2.46 | 2.45 | 2.73 |
| 2015–19 | 2.51 | 2.44 | 2.71 |
| 2020–24 | 2.43 | 2.44 | 2.65 |
| Change | +0.04 | +0.03 | −0.03 |
The average household in Stillwater County has 2.43 people, under the U.S. average of 2.65. Since 2006–10, household size has crept up from 2.39, even as the national average fell. Households are largest in the east and smallest in the southwest.
Household size: the average number of people living in each occupied home. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25010).
Median age in Stillwater County
| Period | Stillwater County | Montana | U.S. |
|---|---|---|---|
| 2006–10 | 45.0 | 39.9 | 37.7 |
| 2010–14 | 46.1 | 40.8 | 38.6 |
| 2015–19 | 47.4 | 41.5 | 39.6 |
| 2020–24 | 46.6 | 41.5 | 40.1 |
| Change | +1.6 | +1.6 | +2.3 |
Stillwater County skews older: half of its residents are older than 46.6, well above the national median of 40.1. That usually means more empty nesters and retirees, and fewer young families. The median age has climbed from 45.0 in 2006–10, in line with the national trend.
Median age: the age that splits residents into two equal halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B01002).
Single-parent households in Stillwater County
| Period | Stillwater County | Montana | U.S. |
|---|---|---|---|
| 2006–10 | 7.0% | 9.4% | 12.3% |
| 2010–14 | 5.1% | 9.8% | 12.3% |
| 2015–19 | 4.6% | 8.7% | 11.6% |
| 2020–24 | 5.0% | 8.8% | 11.6% |
| Change | −2.0 pts | −0.6 pts | −0.6 pts |
Single-parent households are relatively rare in Stillwater County: 5.0% of households, against 11.6% nationally. The single-parent share is down 2.0 points from 2006–10, a much bigger shift than nationally. Stillwater County has a lower share of single-parent households than at least four in five Montana counties.
Single-parent households: households where one adult with no spouse present lives with children under 18. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B11003).
Housing in Stillwater County
Renters in Stillwater County
| Period | Stillwater County | Montana | U.S. |
|---|---|---|---|
| 2006–10 | 24.9% | 31.0% | 33.3% |
| 2010–14 | 21.2% | 32.3% | 35.6% |
| 2015–19 | 19.3% | 31.9% | 36.0% |
| 2020–24 | 17.1% | 30.8% | 34.8% |
| Change | −7.9 pts | −0.1 pts | +1.5 pts |
Only 17.1% of households in Stillwater County rent their homes, far below the national share of 34.8%, so most residents are owners who tend to stay put. Among homeowners, 45.0% have no mortgage at all, above the national share of 39.8%. Since 2006–10, the renter share has fallen 7.9 points, even as the national share rose.
Renters: occupied homes that are rented rather than owned. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25003).
Vacant homes in Stillwater County
| Period | Stillwater County | Montana | U.S. |
|---|---|---|---|
| 2006–10 | 15.5% | 13.2% | 11.4% |
| 2010–14 | 18.8% | 13.9% | 11.4% |
| 2015–19 | 18.0% | 14.1% | 11.1% |
| 2020–24 | 15.5% | 12.2% | 9.6% |
| Change | +0.0 pts | −0.9 pts | −1.8 pts |
Vacant homes make up 15.5% of the housing in Stillwater County, far above the national rate of 9.6%. In resort and lake areas that usually means seasonal and vacation homes; elsewhere it can point to weak demand. Compared with other Montana counties, though, Stillwater County has a lower vacancy rate than most.
Vacant homes: homes with no one living in them, including vacation homes and homes for sale or rent. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25002).
Age of homes in Stillwater County
| Period | Stillwater County | Montana | U.S. |
|---|---|---|---|
| 2006–10 | 1975 | 1974 | 1974 |
| 2010–14 | 1980 | 1977 | 1975 |
| 2015–19 | 1984 | 1978 | 1977 |
| 2020–24 | 1986 | 1982 | 1980 |
| Change | +10 | +7 | +6 |
Homes in Stillwater County are newer than the national norm: the median home was built in 1986, versus 1980 across the U.S. The median year built has moved up from 1975 in 2006–10, a sign of steady new building. The newest homes are mostly in the east, the oldest in the center.
Age of homes: the year that splits the housing stock into older and newer halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25035).
Rent in Stillwater County
| Period | Stillwater County | Montana | U.S. |
|---|---|---|---|
| 2006–10 | $661 | $703 | $965 |
| 2010–14 | $721 | $775 | $1,040 |
| 2015–19 | $785 | $870 | $1,213 |
| 2020–24 | $1,036 | $1,189 | $1,571 |
| Change | +$374 | +$487 | +$606 |
Rent in Stillwater County runs $1,036 a month at the median, utilities included, well below the U.S. median of $1,571. Rent has climbed $374 a month since 2006–10, up 57%, a slower climb than the nation's. The typical renter here spends 22.1% of household income on rent, comfortably under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally. Rents run highest in the east and lowest in the north.
Rent: monthly rent plus the utilities renters pay themselves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25064).
Education in Stillwater County
Bachelor's degrees in Stillwater County
| Period | Stillwater County | Montana | U.S. |
|---|---|---|---|
| 2006–10 | 21.4% | 28.7% | 28.4% |
| 2010–14 | 23.2% | 29.8% | 29.6% |
| 2015–19 | 24.6% | 32.2% | 32.1% |
| 2020–24 | 31.9% | 35.3% | 35.6% |
| Change | +10.5 pts | +6.6 pts | +7.2 pts |
College degrees are a little less common in Stillwater County than nationally: 31.9% of adults 25 and older have a bachelor's or higher, against 35.6%. Since 2006–10, the share with a degree has risen 10.5 points, mirroring the country. Compared with other Montana counties, though, Stillwater County has a higher share of college graduates than most.
Bachelor's degrees: adults 25 and older with a bachelor's degree or higher. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
High school graduates in Stillwater County
| Period | Stillwater County | Montana | U.S. |
|---|---|---|---|
| 2006–10 | 91.5% | 91.2% | 84.9% |
| 2010–14 | 92.1% | 92.6% | 86.1% |
| 2015–19 | 93.9% | 93.6% | 87.7% |
| 2020–24 | 95.4% | 94.6% | 89.3% |
| Change | +3.9 pts | +3.4 pts | +4.3 pts |
High school completion is high in Stillwater County: 95.4% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. Montana as a whole looks much the same. Since 2006–10, the share with a diploma has risen 3.9 points, as it has nationally.
High school graduates: adults 25 and older with a high school diploma, GED or more. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
Jobs in Stillwater County
| Period | Stillwater County | Montana | U.S. |
|---|---|---|---|
| 2006–10 | 3.9% | 5.7% | 8.1% |
| 2010–14 | 4.0% | 6.9% | 9.4% |
| 2015–19 | 3.3% | 4.2% | 5.6% |
| 2020–24 | 3.0% | 3.7% | 5.4% |
| Change | −1.0 pts | −2.0 pts | −2.7 pts |
The job market in Stillwater County has been strong: just 3.0% of the labor force was out of work and looking, well below the national rate of 5.4%. Unemployment has edged down 1.0 points since 2006–10, in line with the national trend. Each figure pools five years of surveys (2020–24), so it describes that whole stretch rather than today's job market.
Unemployment: people looking for work as a share of everyone working or looking. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B23025).
Stillwater County compared with nearby counties
| County | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| Stillwater County | 2.43 | 46.6 | 5.0% | 17.1% | 15.5% | 1986 | $1,036 | 31.9% | 95.4% | 3.0% |
| Yellowstone County | 2.42 | 39.4 | 10.1% | 30.4% | 7.0% | 1983 | $1,287 | 33.6% | 95.4% | 3.4% |
| Park County | 2.15 | 46.7 | 10.3% | 30.6% | 11.2% | 1977 | $1,205 | 39.5% | 96.1% | 2.6% |
| Big Horn County | 3.47 | 33.2 | 20.2% | 33.3% | 14.4% | 1975 | $599 | 17.3% | 89.4% | 14.6% |
| Gallatin County | 2.36 | 36.0 | 5.7% | 38.9% | 10.0% | 1996 | $1,744 | 54.6% | 97.2% | 2.4% |
| Carter County | 2.14 | 57.0 | 1.9% | 37.8% | 27.7% | 1976 | $773 | 20.7% | 93.7% | 3.6% |
| Harding County | 2.22 | 46.3 | 4.0% | 23.5% | 27.6% | 1973 | $521 | 30.4% | 93.8% | 0.9% |
| Perkins County | 2.23 | 45.3 | 9.2% | 21.6% | 25.0% | 1966 | $776 | 25.2% | 94.9% | 4.8% |
| Corson County | 3.48 | 29.4 | 28.7% | 40.9% | 16.2% | 1974 | $521 | 18.3% | 85.3% | 26.2% |
| Walworth County | 2.13 | 41.7 | 6.6% | 23.8% | 17.1% | 1966 | $865 | 27.0% | 91.8% | 3.2% |
| McPherson County | 2.09 | 49.4 | 5.1% | 18.7% | 24.2% | 1964 | $637 | 27.4% | 83.8% | 1.1% |
All figures 2020–24.
Counties with similar populations: Ceiba Municipio, PR · Torrance County, NM · Tishomingo County, MS · Tipton County, IN · Taylor County, WV · Chester County, TN · Charles Mix County, SD · Charles City County, VA · Chariton County, MO · Trego County, KS
About these numbers
Every figure on this page is a BestNeighborhood calculation from the Census Bureau's American Community Survey (ACS), built up from the Census block groups that make up Stillwater County. Each ACS 5-year release pools five years of responses; this page shows the last 15 releases, 2006–10 through 2020–24. Neighboring releases share four of their five years, so they move gradually and small changes between them are within the survey's margin of error; in small places the lines can jump from one release to the next for the same reason. The maps show the same measures for each neighborhood, ranked against the whole country.
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