Valley County, Idaho Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 27th-largest in Idaho
The population of Valley County, Idaho is 12,136 as of the 2023 American Community Survey, making it the 27th-largest county in Idaho. The median household income is $76,125, the median home value is $599,500, and the median age is 49.0.
The population of Valley County has grown 30.5% since 2010 (9,788 → 12,777), a +1.92% annualized rate.
12,136
Population
+1.92%
Annual growth
3
People / sq mi
$76,125
Median Income
$599,500
Median Home Value
Valley County covers 3,665 sq mi of land at 3.3 people per square mile.
About Valley County, ID
Valley County is a county in Idaho with a population of 12,136. It ranks #27 among counties in Idaho by population. The median age is 49.0, older than the national median. The population is 52.7% male and 47.3% female.
The median household income in Valley County is $76,125, near the US median of $74,580. 6.2% of residents live below the federal poverty level. Home values sit at a median of $599,500, with monthly rent averaging $1,011. The homeownership rate of 85.8% is higher than the national rate of 64.8%.
Educational attainment in Valley County reflects 35.4% of adults 25 and older holding a bachelor's degree or higher, near the national average of 34.3%. Roughly 23.5% of workers primarily work from home, noticeably above the national work-from-home rate of 14.2%. The average commute is 15.2 minutes each way.
Valley County Population History (2010-2024)
The county of Valley County had a population of 9,788 in 2010 and 12,777 in 2024, a 30.5% growth over 14 years. The peak was 12,777 in 2024. Average annual growth rate: 1.93%.
12,777
Population (2024)
9,788
Population (2010)
12,777
Peak (2024)
1.93%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 9,788 |
| 2011 | 9,639 |
| 2012 | 9,544 |
| 2013 | 9,585 |
| 2014 | 9,805 |
| 2015 | 10,058 |
| 2016 | 10,438 |
| 2017 | 10,700 |
| 2018 | 11,054 |
| 2019 | 11,443 |
| 2020 | 11,842 |
| 2021 | 12,258 |
| 2022 | 12,436 |
| 2023 | 12,630 |
| 2024 | 12,777 |
Race & Ethnicity
| White | 95.1% |
| Black or African American | 0.1% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.4% |
| Two or More Races | 0.1% |
Age & Sex
49.0
Median Age
47.3%
Female
52.7%
Male
26.6%
Age 65+
Age Distribution
Children (under 15): 15.4% · Seniors (65+): 26.6%
Income & Poverty
| Median household income | $76,125+$1,489 vs state |
| Mean household income | $110,257 |
| Per-capita income | $38,932 |
| Poverty rate | 6.2%-0.8% vs state |
| Unemployment rate | 1.5% |
| Employment-to-population | 50.6% |
Top Industries by Employment
The largest employment sector in Valley County is professional & business services, accounting for 21.1% of workers.
How residents commute
0.5%
Drive alone
7.6%
Carpool
64.6%
Public transit
23.5%
Work from home
15.2 min
Avg commute
Housing
$599,500+$223,500 vs state
Median home value
$1,011
Median rent
85.8%
Homeownership rate
12,601
Total housing units
30.0%
Occupied
70.0%
Vacant
14.2%
Renter-occupied
Social & access
90.0%
With health insurance
96.7%
With broadband internet
51.1%
Foreign-born
10.4%
Veterans (18+)
11.0%
With a disability
97.9%
Speak language other than English at home
Education
91.0%
High School+
35.4%
Bachelor's+
Largest cities in Idaho
Other counties in Idaho
Part of Idaho
Metro areas in Idaho
County rankings
Frequently Asked Questions
Valley County, Idaho has a population of 12,136 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 27th-largest county in Idaho. Population density is 3 people per square mile.
The population of Valley County has grown 30.5% since 2010 (9,788 → 12,777), a +1.92% annualized rate.
The median household income in Valley County, Idaho is $76,125, with mean (average) household income of $110,257 and per-capita income of $38,932. 6.2% of residents live below the federal poverty level.
In Valley County, the largest racial and ethnic groups are White (95.1%), Hispanic or Latino (0.4%), 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 Valley County, Idaho is 49.0 years. Residents are 47.3% female and 52.7% male.
The median home value in Valley County is $599,500 and median monthly rent is $1,011. 85.8% of occupied housing units are owner-occupied. The county has 12,601 total housing units, 70.0% of which are vacant.
The largest employment sector in Valley County, Idaho is professional, scientific, and management services, employing 21.1% of workers. The unemployment rate is 1.5%.
Boise City is among the largest cities associated with Valley County, Idaho, with a population of 235,701.
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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.