Kootenai County, Idaho Population 2026

Updated April 2026 · US Census ACS 2023 5-Year Estimates · 3rd-largest in Idaho

The population of Kootenai County, Idaho is 177,736 as of the 2023 American Community Survey, making it the 3rd-largest county in Idaho. The median household income is $77,034, the median home value is $467,400, and the median age is 40.8.

The population of Kootenai County has grown 35.6% since 2010 (138,860 → 188,323), a +2.20% annualized rate.

Kootenai County within Idaho · Source: US Census TIGER/Line via us-atlas

177,736

Population

+2.20%

Annual growth

144

People / sq mi

$77,034

Median Income

$467,400

Median Home Value

Kootenai County covers 1,238 sq mi of land at 143.6 people per square mile.

About Kootenai County, ID

Kootenai County is a county in Idaho with a population of 177,736. It ranks #3 among counties in Idaho by population. The median age is 40.8, older than the national median. The population is 49.9% male and 50.1% female.

The median household income in Kootenai County is $77,034, near the US median of $74,580. 6.0% of residents live below the federal poverty level. Home values sit at a median of $467,400, with monthly rent averaging $1,330. The homeownership rate of 72.2% is higher than the national rate of 64.8%.

Educational attainment in Kootenai County reflects 28.8% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 14.0% of workers primarily work from home, similar to the national work-from-home rate of 14.2%. The average commute is 22.4 minutes each way.

Kootenai County Population History (2010-2024)

The county of Kootenai County had a population of 138,860 in 2010 and 188,323 in 2024, a 35.6% growth over 14 years. The peak was 188,323 in 2024. Average annual growth rate: 2.21%.

188,323

Population (2024)

138,860

Population (2010)

188,323

Peak (2024)

2.21%

Avg Annual Growth

Year	Population	Change	Annual %	Source
2010	138,860	-	-	estimate
2011	140,986	+2,126	+1.53%	estimate
2012	142,173	+1,187	+0.84%	estimate
2013	144,019	+1,846	+1.30%	estimate
2014	146,687	+2,668	+1.85%	estimate
2015	149,566	+2,879	+1.96%	estimate
2016	153,221	+3,655	+2.44%	estimate
2017	157,594	+4,373	+2.85%	estimate
2018	161,279	+3,685	+2.34%	estimate
2019	165,656	+4,377	+2.71%	estimate
2020	172,791	+7,135	+4.31%	estimate
2021	180,089	+7,298	+4.22%	estimate
2022	183,540	+3,451	+1.92%	estimate
2023	185,237	+1,697	+0.92%	estimate
2024	188,323	+3,086	+1.67%	estimate

Race & Ethnicity

White	88.2%
Black or African American	0.3%
Asian	0.0%
Hispanic or Latino (any race)	2.7%
Two or More Races	0.0%

Age & Sex

40.8

Median Age

50.1%

Female

49.9%

Male

19.6%

Age 65+

Age Distribution

Under 5

5.5%

5–9

6.5%

10–14

6.5%

15–19

6.0%

20–24

5.3%

25–34

12.5%

35–44

13.0%

45–54

11.6%

55–59

6.1%

60–64

7.2%

65–74

12.0%

75–84

5.6%

85+

2.0%

Children (under 15): 18.5% · Seniors (65+): 19.6%

Income & Poverty

Median household income	$77,034+$2,398 vs state
Mean household income	$98,298
Per-capita income	$38,797
Poverty rate	6.0%-1.0% vs state
Unemployment rate	2.0%
Employment-to-population	58.5%

Top Industries by Employment

Professional & business services

21.9%

Construction

10.9%

Education & health care

10.0%

Finance & real estate

9.5%

Information

7.6%

Manufacturing

7.3%

Arts, entertainment & food

5.3%

Retail trade

5.1%

The largest employment sector in Kootenai County is professional & business services, accounting for 21.9% of workers.

How residents commute

0.4%

Drive alone

1.6%

Carpool

74.6%

Public transit

14.0%

Work from home

22.4 min

Avg commute

Housing

$467,400+$91,400 vs state

Median home value

$1,330

Median rent

72.2%

Homeownership rate

78,013

Total housing units

88.6%

Occupied

11.4%

Vacant

27.8%

Renter-occupied

Social & access

90.4%

With health insurance

96.2%

With broadband internet

66.1%

Foreign-born

10.0%

Veterans (18+)

15.0%

With a disability

96.5%

Speak language other than English at home

Education

94.4%

High School+

28.8%

Bachelor's+

Largest cities in Idaho

Boise City (235,701)Meridian (124,865)Nampa (106,289)Idaho Falls (66,672)Caldwell (63,465)Pocatello (57,152)Coeur d'Alene (55,558)Twin Falls (53,219)Post Falls (41,716)Rexburg (39,589)All Idaho cities →

Other counties in Idaho

Ada County (508,052)Canyon County (242,405)Bonneville County (127,056)Twin Falls County (92,121)Bannock County (88,457)Madison County (53,578)Bonner County (49,456)Bingham County (48,993)Nez Perce County (42,477)Latah County (40,315)All Idaho counties →

Part of Idaho

Idaho demographic profile All Idaho data →

Metro areas in Idaho

Boise City (790,640)Coeur d'Alene (177,736)Idaho Falls (161,944)Logan (151,746)Twin Falls (116,909)Pocatello (88,457)Lewiston (64,901)All US metros →

County rankings

US Counties by Population Richest US Counties by Median Household Income Expensive US Counties by Home Value Educated US Counties Counties With Highest Poverty Rates Youngest US Counties by Median Age Oldest US Counties by Median Age Cheapest US Counties by Median Home Value Racially Diverse US Counties Counties With Largest Hispanic Population All rankings →

Frequently Asked Questions

Kootenai County, Idaho has a population of 177,736 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 3rd-largest county in Idaho. Population density is 144 people per square mile.

The population of Kootenai County has grown 35.6% since 2010 (138,860 → 188,323), a +2.20% annualized rate.

The median household income in Kootenai County, Idaho is $77,034, with mean (average) household income of $98,298 and per-capita income of $38,797. 6.0% of residents live below the federal poverty level.

In Kootenai County, the largest racial and ethnic groups are White (88.2%), Hispanic or Latino (2.7%), Black or African American (0.3%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.

The median age in Kootenai County, Idaho is 40.8 years. Residents are 50.1% female and 49.9% male.

The median home value in Kootenai County is $467,400 and median monthly rent is $1,330. 72.2% of occupied housing units are owner-occupied. The county has 78,013 total housing units, 11.4% of which are vacant.

The largest employment sector in Kootenai County, Idaho is professional, scientific, and management services, employing 21.9% of workers. The unemployment rate is 2.0%.

Boise City is among the largest cities associated with Kootenai County, Idaho, with a population of 235,701.