Latah County, Idaho Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 11th-largest in Idaho
The population of Latah County, Idaho is 40,315 as of the 2023 American Community Survey, making it the 11th-largest county in Idaho. The median household income is $65,179, the median home value is $342,500, and the median age is 30.7.
The population of Latah County has grown 13.2% since 2010 (37,258 → 42,180), a +0.89% annualized rate.
40,315
Population
+0.89%
Annual growth
37
People / sq mi
$65,179
Median Income
$342,500
Median Home Value
Latah County covers 1,076 sq mi of land at 37.5 people per square mile.
About Latah County, ID
Age is the most distinctive thing about Latah County: a median age of 30.7, younger than the national median. With 40,315 residents, Latah County is a county in Idaho. It ranks #11 among counties in Idaho by population.
Median household income is $65,179, below the US median of $78,538. The poverty rate is 8.0%, below the national 12.4%. The median home value is $342,500, with typical rent around $905.
The population is unusually well-credentialed for US counties — 44.9% of adults have a four-year degree, above the national 35.0%. About 9.9% of the workforce is home-based, below the national 14.0%, and the average commute runs about 18 minutes each way.
Latah County Population History (2010-2024)
The county of Latah County had a population of 37,258 in 2010 and 42,180 in 2024, a 13.2% growth over 14 years. The peak was 42,180 in 2024. Average annual growth rate: 0.89%.
42,180
Population (2024)
37,258
Population (2010)
42,180
Peak (2024)
0.89%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 37,258 |
| 2011 | 37,872 |
| 2012 | 38,127 |
| 2013 | 38,262 |
| 2014 | 38,570 |
| 2015 | 38,860 |
| 2016 | 39,157 |
| 2017 | 39,903 |
| 2018 | 39,996 |
| 2019 | 40,372 |
| 2020 | 39,638 |
| 2021 | 40,406 |
| 2022 | 41,330 |
| 2023 | 41,691 |
| 2024 | 42,180 |
Race & Ethnicity
| White | 88.6% |
| Black or African American | 1.0% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.0% |
| Two or More Races | 0.2% |
Age & Sex
30.7
Median Age
48.7%
Female
51.3%
Male
14.5%
Age 65+
Age Distribution
Children (under 15): 15.5% · Seniors (65+): 14.5%
Income & Poverty
| Median household income | $65,179$-9,457 vs state |
| Mean household income | $86,327 |
| Per-capita income | $35,157 |
| Poverty rate | 8.0%+1.0% vs state |
| Unemployment rate | 3.8% |
| Employment-to-population | 58.7% |
Top Industries by Employment
The largest employment sector in Latah County is professional & business services, accounting for 32.9% of workers.
How residents commute
0.2%
Drive alone
13.1%
Carpool
64.8%
Public transit
9.9%
Work from home
18.1 min
Avg commute
Housing
$342,500$-33,500 vs state
Median home value
$905
Median rent
60.6%
Homeownership rate
17,429
Total housing units
92.1%
Occupied
7.9%
Vacant
39.4%
Renter-occupied
Social & access
92.6%
With health insurance
96.0%
With broadband internet
55.5%
Foreign-born
5.7%
Veterans (18+)
12.1%
With a disability
94.3%
Speak language other than English at home
Education
96.9%
High School+
44.9%
Bachelor's+
Largest cities in Idaho
Other counties in Idaho
Part of Idaho
Metro areas in Idaho
County rankings
Frequently Asked Questions
Latah County, Idaho has a population of 40,315 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 11th-largest county in Idaho. Population density is 37 people per square mile.
The population of Latah County has grown 13.2% since 2010 (37,258 → 42,180), a +0.89% annualized rate.
The median household income in Latah County, Idaho is $65,179, with mean (average) household income of $86,327 and per-capita income of $35,157. 8.0% of residents live below the federal poverty level.
In Latah County, the largest racial and ethnic groups are White (88.6%), Hispanic or Latino (2.0%), Black or African American (1.0%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Latah County, Idaho is 30.7 years. Residents are 48.7% female and 51.3% male.
The median home value in Latah County is $342,500 and median monthly rent is $905. 60.6% of occupied housing units are owner-occupied. The county has 17,429 total housing units, 7.9% of which are vacant.
The largest employment sector in Latah County, Idaho is professional, scientific, and management services, employing 32.9% of workers. The unemployment rate is 3.8%.
Boise City is among the largest cities associated with Latah 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.