Jerome County, Idaho Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 16th-largest in Idaho
The population of Jerome County, Idaho is 24,788 as of the 2023 American Community Survey, making it the 16th-largest county in Idaho. The median household income is $69,338, the median home value is $254,000, and the median age is 33.6.
The population of Jerome County has grown 16.1% since 2010 (22,438 → 26,056), a +1.07% annualized rate.
24,788
Population
+1.07%
Annual growth
41
People / sq mi
$69,338
Median Income
$254,000
Median Home Value
Jerome County covers 598 sq mi of land at 41.5 people per square mile.
About Jerome County, ID
Age is the most distinctive thing about Jerome County: a median age of 33.6, younger than the national median. Jerome County is a county in Idaho with a population of 24,788. It ranks #16 among counties in Idaho by population.
Median household income is $69,338, below the US median of $78,538. The poverty rate is 12.6%, close to the national 12.4%. The median home value is $254,000, with typical rent around $862.
College credentials are comparatively rare here: just 13.4%, below the national 35.0%. Remote work is on the lower side here, at 4.9%, below the national 14.0%, and the average commute runs about 21 minutes each way.
Jerome County Population History (2010-2024)
The county of Jerome County had a population of 22,438 in 2010 and 26,056 in 2024, a 16.1% growth over 14 years. The peak was 26,056 in 2024. Average annual growth rate: 1.08%.
26,056
Population (2024)
22,438
Population (2010)
26,056
Peak (2024)
1.08%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 22,438 |
| 2011 | 22,516 |
| 2012 | 22,572 |
| 2013 | 22,759 |
| 2014 | 22,918 |
| 2015 | 22,960 |
| 2016 | 23,438 |
| 2017 | 23,791 |
| 2018 | 24,078 |
| 2019 | 24,486 |
| 2020 | 24,268 |
| 2021 | 24,740 |
| 2022 | 25,228 |
| 2023 | 25,574 |
| 2024 | 26,056 |
Race & Ethnicity
| White | 69.9% |
| Black or African American | 0.1% |
| Asian | 0.1% |
| Hispanic or Latino (any race) | 2.7% |
| Two or More Races | 0.0% |
Age & Sex
33.6
Median Age
48.4%
Female
51.6%
Male
13.4%
Age 65+
Age Distribution
Children (under 15): 24.4% · Seniors (65+): 13.4%
Income & Poverty
| Median household income | $69,338$-5,298 vs state |
| Mean household income | $87,894 |
| Per-capita income | $29,033 |
| Poverty rate | 12.6%+5.6% vs state |
| Unemployment rate | 2.4% |
| Employment-to-population | 62.8% |
Top Industries by Employment
The largest employment sector in Jerome County is agriculture, accounting for 16.2% of workers.
How residents commute
0.2%
Drive alone
0.7%
Carpool
83.5%
Public transit
4.9%
Work from home
20.7 min
Avg commute
Housing
$254,000$-122,000 vs state
Median home value
$862
Median rent
75.5%
Homeownership rate
8,725
Total housing units
94.0%
Occupied
6.0%
Vacant
24.5%
Renter-occupied
Social & access
84.2%
With health insurance
94.1%
With broadband internet
29.5%
Foreign-born
6.0%
Veterans (18+)
12.7%
With a disability
66.3%
Speak language other than English at home
Education
73.4%
High School+
13.4%
Bachelor's+
Largest cities in Idaho
Other counties in Idaho
Part of Idaho
Metro areas in Idaho
County rankings
Frequently Asked Questions
Jerome County, Idaho has a population of 24,788 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 16th-largest county in Idaho. Population density is 41 people per square mile.
The population of Jerome County has grown 16.1% since 2010 (22,438 → 26,056), a +1.07% annualized rate.
The median household income in Jerome County, Idaho is $69,338, with mean (average) household income of $87,894 and per-capita income of $29,033. 12.6% of residents live below the federal poverty level.
In Jerome County, the largest racial and ethnic groups are White (69.9%), Hispanic or Latino (2.7%), Black or African American (0.1%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Jerome County, Idaho is 33.6 years. Residents are 48.4% female and 51.6% male.
The median home value in Jerome County is $254,000 and median monthly rent is $862. 75.5% of occupied housing units are owner-occupied. The county has 8,725 total housing units, 6.0% of which are vacant.
The largest employment sector in Jerome County, Idaho is agriculture, forestry, fishing, and mining, employing 16.2% of workers. The unemployment rate is 2.4%.
Boise City is among the largest cities associated with Jerome County, Idaho, with a population of 235,701.
Jerome County, ID Climate
Jerome County, ID has an average annual temperature of 9°C (48°F) and receives about 267 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
9°C
Avg Temp
267
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -3° / 26° | 36 mm |
| February | 0° / 31° | 25 mm |
| March | 4° / 40° | 28 mm |
| April | 8° / 47° | 19 mm |
| May | 13° / 55° | 27 mm |
| June | 18° / 64° | 19 mm |
| July | 22° / 72° | 6 mm |
| August | 22° / 71° | 9 mm |
| September | 16° / 61° | 15 mm |
| October | 10° / 49° | 18 mm |
| November | 2° / 36° | 34 mm |
| December | -3° / 27° | 31 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Jerome County, ID
The most comfortable months to visit Jerome County, ID are typically August, July and June, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 32°C high). The coldest is January (near -8°C low). January is usually the wettest month.
Where to stay near Jerome County
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Statewide data for Idaho
Population, race, income, age, and trends across Idaho
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.