Population 8,249 · Census ACS 2020–24
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Population and households in Lemhi County
Household size in Lemhi County
| Period | Lemhi County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 2.23 | 2.72 | 2.68 |
| 2010–14 | 1.98 | 2.78 | 2.73 |
| 2015–19 | 2.14 | 2.76 | 2.71 |
| 2020–24 | 2.37 | 2.79 | 2.65 |
| Change | +0.14 | +0.07 | −0.03 |
Households in Lemhi County are small: just 2.37 people on average, compared with 2.65 nationally. That is typical of places where many people live alone or as couples, and fewer have children at home. Since 2006–10, household size has climbed from 2.23, even as the national average fell.
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 Lemhi County
| Period | Lemhi County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 46.9 | 35.5 | 37.7 |
| 2010–14 | 50.8 | 36.6 | 38.6 |
| 2015–19 | 51.4 | 37.6 | 39.6 |
| 2020–24 | 53.9 | 38.2 | 40.1 |
| Change | +7.0 | +2.7 | +2.3 |
With a median age of 53.9, Lemhi County is noticeably older than the country as a whole (40.1), an age mix that tilts toward empty nesters and retirees. The median age has climbed from 46.9 in 2006–10, in line with the national trend. Only one other Idaho county is older.
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 Lemhi County
| Period | Lemhi County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 10.8% | 10.0% | 12.3% |
| 2010–14 | 6.7% | 10.2% | 12.3% |
| 2015–19 | 5.9% | 9.3% | 11.6% |
| 2020–24 | 3.8% | 9.3% | 11.6% |
| Change | −7.1 pts | −0.7 pts | −0.6 pts |
Single parents head only 3.8% of households in Lemhi County, well below the national share of 11.6%. The single-parent share is down 7.1 points from 2006–10, a much bigger shift than nationally. Only three of Idaho's 44 counties have a lower share of single-parent households.
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 Lemhi County
Renters in Lemhi County
| Period | Lemhi County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 27.2% | 29.0% | 33.3% |
| 2010–14 | 29.7% | 30.8% | 35.6% |
| 2015–19 | 22.4% | 30.0% | 36.0% |
| 2020–24 | 20.7% | 27.9% | 34.8% |
| Change | −6.5 pts | −1.1 pts | +1.5 pts |
Lemhi County is largely a place of homeowners: only 20.7% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Just over half of owners (53.1%) have paid off their mortgages, well above the national share of 39.8%. Since 2006–10, the renter share has fallen 6.5 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 Lemhi County
| Period | Lemhi County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 23.0% | 10.4% | 11.4% |
| 2010–14 | 14.9% | 11.0% | 11.4% |
| 2015–19 | 24.1% | 10.5% | 11.1% |
| 2020–24 | 24.0% | 9.3% | 9.6% |
| Change | +1.0 pts | −1.1 pts | −1.8 pts |
Vacancy is high in Lemhi County: 24.0% of homes are empty, 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. Vacancy is up 1.0 points from 2006–10, even as the national rate fell.
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 Lemhi County
| Period | Lemhi County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 1975 | 1982 | 1974 |
| 2010–14 | 1977 | 1984 | 1975 |
| 2015–19 | 1979 | 1986 | 1977 |
| 2020–24 | 1980 | 1989 | 1980 |
| Change | +5 | +7 | +6 |
Homes in Lemhi County are the same age as the nation's housing: the median home was built in 1980. Homes here are older than in Idaho as a whole, where the median home dates to 1989. The median year built has moved up from 1975 in 2006–10, a sign of steady new building.
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 Lemhi County
| Period | Lemhi County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | $581 | $766 | $965 |
| 2010–14 | $600 | $820 | $1,040 |
| 2015–19 | $665 | $941 | $1,213 |
| 2020–24 | $851 | $1,407 | $1,571 |
| Change | +$269 | +$641 | +$606 |
Rent in Lemhi County runs $851 a month at the median, utilities included, well below the U.S. median of $1,571. Rents are up $269 a month from 2006–10, a 46% rise, a slower climb than the nation's. The typical renter here spends 29.0% of household income on rent, just under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally. Renters on a budget will find the lowest rents in the east; the highest are 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 Lemhi County
Bachelor's degrees in Lemhi County
| Period | Lemhi County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 22.7% | 25.0% | 28.4% |
| 2010–14 | 23.2% | 25.9% | 29.6% |
| 2015–19 | 21.9% | 27.8% | 32.1% |
| 2020–24 | 24.9% | 31.7% | 35.6% |
| Change | +2.2 pts | +6.6 pts | +7.2 pts |
Fewer adults in Lemhi County have a four-year degree than in the country as a whole: 24.9%, against 35.6% nationally. The share with a degree has risen 2.2 points since 2006–10, a smaller shift than nationally.
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 Lemhi County
| Period | Lemhi County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 91.5% | 88.7% | 84.9% |
| 2010–14 | 92.0% | 89.3% | 86.1% |
| 2015–19 | 91.9% | 90.8% | 87.7% |
| 2020–24 | 91.2% | 92.1% | 89.3% |
| Change | −0.3 pts | +3.4 pts | +4.3 pts |
High school completion in Lemhi County is a bit above the national rate: 91.2% of adults have a diploma or equivalent, against 89.3%. The picture is much the same across Idaho.
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 Lemhi County
| Period | Lemhi County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 9.3% | 7.0% | 8.1% |
| 2010–14 | 7.3% | 8.1% | 9.4% |
| 2015–19 | 4.1% | 4.4% | 5.6% |
| 2020–24 | 2.1% | 3.8% | 5.4% |
| Change | −7.2 pts | −3.2 pts | −2.7 pts |
Unemployment in Lemhi County has been low: just 2.1% of the labor force was out of work and looking, well below the national rate of 5.4%. Since 2006–10, unemployment has fallen 7.2 points, as it has nationally. 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).
Lemhi 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Lemhi County | 2.37 | 53.9 | 3.8% | 20.7% | 24.0% | 1980 | $851 | 24.9% | 91.2% | 2.1% |
| Beaverhead County | 2.24 | 43.4 | 5.4% | 34.2% | 16.8% | 1982 | $812 | 37.8% | 92.6% | 1.4% |
| Madison County | 2.44 | 50.6 | 2.5% | 19.0% | 37.0% | 1995 | $1,165 | 32.7% | 93.6% | 3.0% |
| Valley County | 2.95 | 47.7 | 3.2% | 18.1% | 63.7% | 1993 | $1,115 | 39.1% | 90.4% | 5.4% |
| Adams County | 2.66 | 53.1 | 3.5% | 15.3% | 32.1% | 1985 | $906 | 22.2% | 93.1% | 7.4% |
| Gallatin County | 2.36 | 36.0 | 5.7% | 38.9% | 10.0% | 1996 | $1,744 | 54.6% | 97.2% | 2.4% |
| Park County | 2.15 | 46.7 | 10.3% | 30.6% | 11.2% | 1977 | $1,205 | 39.5% | 96.1% | 2.6% |
| Wallowa County | 2.22 | 49.3 | 8.5% | 27.5% | 21.5% | 1970 | $1,127 | 38.7% | 93.9% | 3.7% |
| Baker County | 2.25 | 46.4 | 8.1% | 28.5% | 12.9% | 1965 | $983 | 26.9% | 92.5% | 5.4% |
| Union County | 2.39 | 39.9 | 9.0% | 34.5% | 8.8% | 1971 | $1,039 | 26.0% | 93.6% | 5.6% |
| Stillwater County | 2.43 | 46.6 | 5.0% | 17.1% | 15.5% | 1986 | $1,036 | 31.9% | 95.4% | 3.0% |
All figures 2020–24.
Counties with similar populations: Reeves County, TX · Hudspeth County, TX · Huerfano County, CO · Humboldt County, IA · Humphreys County, MS · Rappahannock County, VA · Rawlins County, KS · Reagan County, TX · Red Lake County, MN · Red River County, TX
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 Lemhi 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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