Fremont County, ID Demographics

Population 13,943 · Census ACS 2020–24

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Median age by neighborhoodHistory and comparison ↓︎
Fremont County, ID map of median age by neighborhood
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Population and households in Fremont County

Household size in Fremont County

Household size, people per household
PeriodFremont CountyIdahoU.S.
2006–102.902.722.68
2010–142.772.782.73
2015–192.872.762.71
2020–242.922.792.65
Change+0.02+0.07−0.03
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Fremont County is a place of big households: 2.92 people per home on average, compared with 2.65 nationally. Numbers like that usually point to plenty of families with kids. Households are largest in the southwest and smallest in the northeast.

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 Fremont County

Median age, years
PeriodFremont CountyIdahoU.S.
2006–1034.835.537.7
2010–1437.636.638.6
2015–1939.137.639.6
2020–2440.038.240.1
Change+5.2+2.7+2.3
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At 40.0, the median age in Fremont County is close to the national median of 40.1, so its age mix looks much like the country's. The population here is older than in Idaho as a whole, where the median age is 38.2. The median age has climbed from 34.8 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 Fremont County

Single-parent households, % of households
PeriodFremont CountyIdahoU.S.
2006–105.8%10.0%12.3%
2010–146.4%10.2%12.3%
2015–198.1%9.3%11.6%
2020–249.2%9.3%11.6%
Change+3.4 pts−0.7 pts−0.6 pts
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Single-parent households are less common in Fremont County than nationally: 9.2%, against 11.6%. The picture is much the same across Idaho. The single-parent share is up 3.4 points from 2006–10, 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 Fremont County

Renters in Fremont County

Renters, % of occupied homes
PeriodFremont CountyIdahoU.S.
2006–1018.4%29.0%33.3%
2010–1419.0%30.8%35.6%
2015–1918.8%30.0%36.0%
2020–2417.4%27.9%34.8%
Change−1.0 pts−1.1 pts+1.5 pts
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Fremont County is largely a place of homeowners: only 17.4% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Among homeowners, 44.2% have no mortgage at all, above the national share of 39.8%. The renter share is down 1.0 points from 2006–10, 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 Fremont County

Vacant homes, % of all homes
PeriodFremont CountyIdahoU.S.
2006–1020.7%10.4%11.4%
2010–1419.9%11.0%11.4%
2015–1922.9%10.5%11.1%
2020–2418.3%9.3%9.6%
Change−2.3 pts−1.1 pts−1.8 pts
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Vacant homes make up 18.3% of the housing in Fremont 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. Since 2006–10, vacancy has fallen 2.3 points, in line with the national trend.

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 Fremont County

Age of homes, median year built
PeriodFremont CountyIdahoU.S.
2006–10196819821974
2010–14197219841975
2015–19197619861977
2020–24197519891980
Change+7+7+6
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Housing in Fremont County leans a little older: the median home dates to 1975, against 1980 nationally. The median year built has moved up from 1968 in 2006–10, a sign of steady new building. The newest homes are mostly in the south, 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 Fremont County

Rent, per month
PeriodFremont CountyIdahoU.S.
2006–10$570$766$965
2010–14$664$820$1,040
2015–19$831$941$1,213
2020–24$919$1,407$1,571
Change+$349+$641+$606
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The median renter in Fremont County pays $919 a month for rent and utilities, well below the national median of $1,571. Rent has climbed $349 a month since 2006–10, up 61%, roughly in step with the nation. Rent takes 22.8% of the typical renter's income, comfortably under the 30% mark often used to define affordable rent. The priciest rents are in the center; the most affordable are in the northeast.

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 Fremont County

Bachelor's degrees in Fremont County

Bachelor's degrees, % of adults 25+
PeriodFremont CountyIdahoU.S.
2006–1019.7%25.0%28.4%
2010–1419.8%25.9%29.6%
2015–1922.9%27.8%32.1%
2020–2422.8%31.7%35.6%
Change+3.1 pts+6.6 pts+7.2 pts
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Fewer adults in Fremont County have a four-year degree than in the country as a whole: 22.8%, against 35.6% nationally. The share with a degree is up 3.1 points from 2006–10, mirroring the country. College graduates are most concentrated in the northeast and least in the southwest.

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 Fremont County

High school graduates, % of adults 25+
PeriodFremont CountyIdahoU.S.
2006–1084.7%88.7%84.9%
2010–1488.6%89.3%86.1%
2015–1986.8%90.8%87.7%
2020–2491.2%92.1%89.3%
Change+6.5 pts+3.4 pts+4.3 pts
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About nine in ten adults in Fremont County have finished high school (91.2%), a bit above the national rate of 89.3%. The picture is much the same across Idaho. The share with a diploma has risen 6.5 points since 2006–10, mirroring the country.

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 Fremont County

Unemployment, % of the labor force
PeriodFremont CountyIdahoU.S.
2006–104.2%7.0%8.1%
2010–146.7%8.1%9.4%
2015–195.8%4.4%5.6%
2020–243.8%3.8%5.4%
Change−0.4 pts−3.2 pts−2.7 pts
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Jobs have been easier to find in Fremont County than nationally: unemployment was 3.8%, against 5.4%. That is in line with the rest of Idaho. 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).

Fremont County compared with nearby counties

CountyHousehold sizeMedian ageSingle parentsRentersVacant homesMedian year builtMedian rentBachelor's degreeHigh school diplomaUnemployment
Fremont County2.9240.09.2%17.4%18.3%1975$91922.8%91.2%3.8%
Clark County2.9331.19.3%38.7%38.8%1979$77320.5%74.4%2.1%
Washakie County2.2545.17.2%25.8%14.1%1970$72322.9%90.5%2.9%
Boise County2.3252.05.6%9.7%32.9%1989$1,01531.0%96.2%3.4%
Payette County2.7839.88.6%25.5%6.9%1980$91216.5%85.7%3.4%
Malheur County2.7636.215.0%36.8%12.8%1972$84315.4%82.1%4.7%
Weston County2.3145.99.5%13.2%16.2%1976$75320.8%91.3%1.4%
Pennington County2.4140.710.2%30.7%10.8%1985$1,20234.6%94.4%3.2%
Deschutes County2.4643.89.2%30.0%10.8%1997$1,91044.4%95.4%4.2%
Haakon County2.4247.00.8%20.8%23.2%1975$49521.1%96.4%0.0%
Lane County2.4042.110.2%40.3%6.2%1979$1,42334.3%93.3%6.4%

All figures 2020–24.

Counties with similar populations: Mills County, TX · North Slope Borough, AK · Nome Census Area, AK · Nolan County, TX · Nicholas County, KY · Newton County, AR · New Madrid County, MO · Nevada County, AR · Nemaha County, NE · Northampton County, NC

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 Fremont 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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