Population 93,734 · Census ACS 2020–24
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Population and households in Twin Falls County
Household size in Twin Falls County
| Period | Twin Falls County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 2.69 | 2.72 | 2.68 |
| 2010–14 | 2.75 | 2.78 | 2.73 |
| 2015–19 | 2.74 | 2.76 | 2.71 |
| 2020–24 | 2.72 | 2.79 | 2.65 |
| Change | +0.03 | +0.07 | −0.03 |
Households in Twin Falls County average 2.72 people, about the same as the country as a whole (2.65). Household size has crept up from 2.69 in 2006–10, even as the national average fell. Households are largest in the northeast and smallest in the center.
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 Twin Falls County
| Period | Twin Falls County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 35.3 | 35.5 | 37.7 |
| 2010–14 | 35.8 | 36.6 | 38.6 |
| 2015–19 | 36.2 | 37.6 | 39.6 |
| 2020–24 | 36.7 | 38.2 | 40.1 |
| Change | +1.5 | +2.7 | +2.3 |
Twin Falls County is younger than the country as a whole: its median age is 36.7, against 40.1 nationally. Idaho as a whole looks much the same. The median age has climbed from 35.3 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 Twin Falls County
| Period | Twin Falls County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 11.2% | 10.0% | 12.3% |
| 2010–14 | 12.0% | 10.2% | 12.3% |
| 2015–19 | 9.7% | 9.3% | 11.6% |
| 2020–24 | 13.3% | 9.3% | 11.6% |
| Change | +2.1 pts | −0.7 pts | −0.6 pts |
Single parents head just over one in eight households in Twin Falls County (13.3%), a bit above the national share of 11.6%. The single-parent share has risen 2.1 points since 2006–10, even as the national share fell. Only one other Idaho county has a higher 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 Twin Falls County
Renters in Twin Falls County
| Period | Twin Falls County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 32.1% | 29.0% | 33.3% |
| 2010–14 | 33.5% | 30.8% | 35.6% |
| 2015–19 | 31.1% | 30.0% | 36.0% |
| 2020–24 | 29.5% | 27.9% | 34.8% |
| Change | −2.5 pts | −1.1 pts | +1.5 pts |
Most households in Twin Falls County own their homes; 29.5% rent, a little below the national share of 34.8%. Nearly four in ten owners (37.8%) have paid off their mortgages, about the same as nationally. Renting is most common in the center and least common in the northeast. Since 2006–10, the renter share has fallen 2.5 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 Twin Falls County
| Period | Twin Falls County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 9.9% | 10.4% | 11.4% |
| 2010–14 | 9.4% | 11.0% | 11.4% |
| 2015–19 | 7.5% | 10.5% | 11.1% |
| 2020–24 | 5.3% | 9.3% | 9.6% |
| Change | −4.6 pts | −1.1 pts | −1.8 pts |
Empty homes are scarce in Twin Falls County: just 5.3% sit vacant, compared with 9.6% nationally, a sign of a tight housing market. Vacancy is down 4.6 points from 2006–10, in line with the national trend. Of Idaho's 44 counties, only three have a lower vacancy rate.
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 Twin Falls County
| Period | Twin Falls County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 1976 | 1982 | 1974 |
| 2010–14 | 1979 | 1984 | 1975 |
| 2015–19 | 1981 | 1986 | 1977 |
| 2020–24 | 1983 | 1989 | 1980 |
| Change | +7 | +7 | +6 |
Homes in Twin Falls County are about the same age as the nation's housing: the median home was built in 1983, versus 1980 nationally. Homes here are older than in Idaho overall, where the median home dates to 1989. The median year built has moved up from 1976 in 2006–10, a sign of steady new building. Newer construction is concentrated in the south, while the center has the oldest housing.
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 Twin Falls County
| Period | Twin Falls County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | $718 | $766 | $965 |
| 2010–14 | $758 | $820 | $1,040 |
| 2015–19 | $886 | $941 | $1,213 |
| 2020–24 | $1,204 | $1,407 | $1,571 |
| Change | +$486 | +$641 | +$606 |
Rent in Twin Falls County runs $1,204 a month at the median, utilities included, well below the U.S. median of $1,571. Rent has climbed $486 a month since 2006–10, up 68%, faster than rents rose nationally. Rent takes 28.7% of the typical renter's income, just under the 30% mark often used to define affordable rent. Renters on a budget will find the lowest rents in the south; 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 Twin Falls County
Bachelor's degrees in Twin Falls County
| Period | Twin Falls County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 17.8% | 25.0% | 28.4% |
| 2010–14 | 17.3% | 25.9% | 29.6% |
| 2015–19 | 21.0% | 27.8% | 32.1% |
| 2020–24 | 23.3% | 31.7% | 35.6% |
| Change | +5.4 pts | +6.6 pts | +7.2 pts |
Fewer adults in Twin Falls County have a four-year degree than in the country as a whole: 23.3%, against 35.6% nationally. The share with a degree has risen 5.4 points since 2006–10, mirroring the country. College graduates are most concentrated in the northeast and least in the south.
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 Twin Falls County
| Period | Twin Falls County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 83.9% | 88.7% | 84.9% |
| 2010–14 | 85.3% | 89.3% | 86.1% |
| 2015–19 | 87.6% | 90.8% | 87.7% |
| 2020–24 | 89.7% | 92.1% | 89.3% |
| Change | +5.8 pts | +3.4 pts | +4.3 pts |
About as many adults in Twin Falls County have finished high school as nationally: 89.7%, against 89.3%. The rate is lower than in Idaho overall (92.1%). Since 2006–10, the share with a diploma has risen 5.8 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 Twin Falls County
| Period | Twin Falls County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 5.7% | 7.0% | 8.1% |
| 2010–14 | 7.3% | 8.1% | 9.4% |
| 2015–19 | 3.5% | 4.4% | 5.6% |
| 2020–24 | 2.9% | 3.8% | 5.4% |
| Change | −2.8 pts | −3.2 pts | −2.7 pts |
Unemployment in Twin Falls County has been low: just 2.9% of the labor force was out of work and looking, well below the national rate of 5.4%. Unemployment has fallen 2.8 points since 2006–10, in line with the national trend. Because the Census pools five years of responses (2020–24), these rates smooth over short swings and lag the current 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).
Twin Falls 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Twin Falls County | 2.72 | 36.7 | 13.3% | 29.5% | 5.3% | 1983 | $1,204 | 23.3% | 89.7% | 2.9% |
| Jerome County | 3.07 | 36.0 | 14.3% | 24.8% | 7.1% | 1981 | $1,079 | 14.3% | 72.6% | 3.8% |
| Cassia County | 3.12 | 33.6 | 12.6% | 31.4% | 7.7% | 1974 | $1,090 | 20.5% | 84.3% | 2.1% |
| Minidoka County | 2.75 | 37.0 | 12.8% | 30.8% | 7.5% | 1979 | $935 | 15.7% | 82.7% | 2.8% |
| Caribou County | 2.85 | 38.4 | 6.4% | 18.4% | 19.7% | 1968 | $900 | 16.6% | 90.2% | 1.7% |
| Lincoln County | 2.49 | 43.1 | 6.7% | 23.0% | 15.7% | 1989 | $1,168 | 25.7% | 95.5% | 1.8% |
| Lake County | 2.26 | 45.7 | 6.1% | 32.7% | 18.1% | 1971 | $945 | 21.9% | 90.6% | 3.9% |
| Josephine County | 2.41 | 47.9 | 11.5% | 28.3% | 7.7% | 1982 | $1,264 | 19.6% | 90.3% | 7.0% |
| Sioux County | 2.39 | 40.5 | 3.3% | 40.4% | 27.8% | 1958 | $759 | 22.2% | 94.3% | 1.5% |
| Brown County | 2.22 | 45.3 | 6.4% | 25.8% | 22.8% | 1959 | $888 | 23.9% | 92.5% | 1.6% |
| Rock County | 2.25 | 48.4 | 3.0% | 30.7% | 27.4% | 1968 | $648 | 27.4% | 92.1% | 1.0% |
All figures 2020–24.
Counties with similar populations: Arecibo Municipio, PR · Calvert County, MD · Cabell County, WV · Burleigh County, ND · Burke County, NC · Bulloch County, GA · Bullitt County, KY · Buchanan County, MO · Benton County, OR · Bastrop 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 Twin Falls 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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