Population 25,483 · Census ACS 2020–24
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Population and households in Cassia County
Household size in Cassia County
| Period | Cassia County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 2.93 | 2.72 | 2.68 |
| 2010–14 | 2.96 | 2.78 | 2.73 |
| 2015–19 | 3.04 | 2.76 | 2.71 |
| 2020–24 | 3.12 | 2.79 | 2.65 |
| Change | +0.19 | +0.07 | −0.03 |
Cassia County is a place of big households: 3.12 people per home on average, compared with 2.65 nationally. Numbers like that usually point to plenty of families with kids. Since 2006–10, household size has climbed from 2.93, even as the national average fell. Of Idaho's 44 counties, only two have larger households.
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 Cassia County
| Period | Cassia County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 32.5 | 35.5 | 37.7 |
| 2010–14 | 33.8 | 36.6 | 38.6 |
| 2015–19 | 33.5 | 37.6 | 39.6 |
| 2020–24 | 33.6 | 38.2 | 40.1 |
| Change | +1.1 | +2.7 | +2.3 |
Cassia County is young: half of its residents are under 33.6, compared with a national median of 40.1. The population tilts toward young families with children. The median age has climbed from 32.5 in 2006–10, as it has nationally.
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 Cassia County
| Period | Cassia County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 10.3% | 10.0% | 12.3% |
| 2010–14 | 8.9% | 10.2% | 12.3% |
| 2015–19 | 10.6% | 9.3% | 11.6% |
| 2020–24 | 12.6% | 9.3% | 11.6% |
| Change | +2.3 pts | −0.7 pts | −0.6 pts |
Single-parent households are about as common in Cassia County as they are nationally: 12.6%, against 11.6%. Single parents are more common here than in Idaho as a whole (9.3%). Since 2006–10, the single-parent share has risen 2.3 points, even as the national share fell.
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 Cassia County
Renters in Cassia County
| Period | Cassia County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 31.4% | 29.0% | 33.3% |
| 2010–14 | 30.4% | 30.8% | 35.6% |
| 2015–19 | 29.7% | 30.0% | 36.0% |
| 2020–24 | 31.4% | 27.9% | 34.8% |
| Change | −0.0 pts | −1.1 pts | +1.5 pts |
Most households in Cassia County own their homes; 31.4% rent, a little below the national share of 34.8%. Still, renters make up a bigger share here than in Idaho as a whole (27.9%). Among homeowners, 45.2% have no mortgage at all, above the national share of 39.8%. Rentals cluster in the north; owners are most common in the southwest.
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 Cassia County
| Period | Cassia County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 9.3% | 10.4% | 11.4% |
| 2010–14 | 8.9% | 11.0% | 11.4% |
| 2015–19 | 12.4% | 10.5% | 11.1% |
| 2020–24 | 7.7% | 9.3% | 9.6% |
| Change | −1.6 pts | −1.1 pts | −1.8 pts |
Vacancy is on the low side in Cassia County: 7.7% of homes sit empty, against 9.6% nationally, which points to steady demand for housing. Since 2006–10, vacancy has fallen 1.6 points, as it has nationally.
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 Cassia County
| Period | Cassia County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 1969 | 1982 | 1974 |
| 2010–14 | 1972 | 1984 | 1975 |
| 2015–19 | 1974 | 1986 | 1977 |
| 2020–24 | 1974 | 1989 | 1980 |
| Change | +6 | +7 | +6 |
Homes in Cassia County run a bit older than the national norm, with a median build year of 1974 against 1980. The median year built has moved up from 1969 in 2006–10, a sign of steady new building. Newer construction is concentrated in the center, while the southwest 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 Cassia County
| Period | Cassia County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | $522 | $766 | $965 |
| 2010–14 | $576 | $820 | $1,040 |
| 2015–19 | $681 | $941 | $1,213 |
| 2020–24 | $1,090 | $1,407 | $1,571 |
| Change | +$568 | +$641 | +$606 |
A typical rental in Cassia County costs $1,090 a month with utilities, well below the national median of $1,571. Rent has climbed $568 a month since 2006–10, up 109%, faster than rents rose nationally. Rent takes 27.0% of the typical renter's income, comfortably under the 30% mark often used to define affordable rent. Rents run highest in the center and lowest in the southwest.
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 Cassia County
Bachelor's degrees in Cassia County
| Period | Cassia County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 16.2% | 25.0% | 28.4% |
| 2010–14 | 16.9% | 25.9% | 29.6% |
| 2015–19 | 18.6% | 27.8% | 32.1% |
| 2020–24 | 20.5% | 31.7% | 35.6% |
| Change | +4.3 pts | +6.6 pts | +7.2 pts |
Fewer adults in Cassia County have a four-year degree than in the country as a whole: 20.5%, against 35.6% nationally. Since 2006–10, the share with a degree has risen 4.3 points, mirroring the country. College graduates are most concentrated in the center and least in the north.
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 Cassia County
| Period | Cassia County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 78.4% | 88.7% | 84.9% |
| 2010–14 | 78.9% | 89.3% | 86.1% |
| 2015–19 | 83.5% | 90.8% | 87.7% |
| 2020–24 | 84.3% | 92.1% | 89.3% |
| Change | +5.9 pts | +3.4 pts | +4.3 pts |
Nearly one in six adults in Cassia County never finished high school, more than nationally: 84.3% have a diploma or equivalent, against 89.3% across the U.S. The share with a diploma is up 5.9 points from 2006–10, mirroring the country. Cassia County has a lower share of high school graduates than the great majority of Idaho counties.
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 Cassia County
| Period | Cassia County | Idaho | U.S. |
|---|---|---|---|
| 2006–10 | 7.1% | 7.0% | 8.1% |
| 2010–14 | 7.4% | 8.1% | 9.4% |
| 2015–19 | 2.9% | 4.4% | 5.6% |
| 2020–24 | 2.1% | 3.8% | 5.4% |
| Change | −5.0 pts | −3.2 pts | −2.7 pts |
Unemployment in Cassia 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%. Unemployment is down 5.0 points from 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).
Cassia 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Cassia County | 3.12 | 33.6 | 12.6% | 31.4% | 7.7% | 1974 | $1,090 | 20.5% | 84.3% | 2.1% |
| Twin Falls County | 2.72 | 36.7 | 13.3% | 29.5% | 5.3% | 1983 | $1,204 | 23.3% | 89.7% | 2.9% |
| Bear Lake County | 3.02 | 41.1 | 6.2% | 10.5% | 31.6% | 1971 | $841 | 22.1% | 92.9% | 2.9% |
| Lake County | 2.26 | 45.7 | 6.1% | 32.7% | 18.1% | 1971 | $945 | 21.9% | 90.6% | 3.9% |
| Jackson County | 2.45 | 44.3 | 10.6% | 34.1% | 7.1% | 1985 | $1,492 | 31.7% | 91.8% | 5.2% |
| 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% |
| Holt County | 2.52 | 43.2 | 7.5% | 27.7% | 17.1% | 1965 | $757 | 29.6% | 94.1% | 1.1% |
| Cedar County | 2.38 | 43.7 | 5.3% | 20.4% | 12.1% | 1963 | $710 | 23.7% | 96.4% | 1.7% |
All figures 2020–24.
Counties with similar populations: Taos County, NM · Gooding County, ID · Stone County, MS · Sullivan County, IN · Giles County, VA · Giles County, TN · Gilchrist County, FL · George County, MS · Geneva County, AL · Gallia County, OH
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 Cassia 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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