Ada County, Idaho Demographics 2026

Name: Ada County, Idaho Demographics
Creator: U.S. Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

Ada County, Idaho has a population of 518,935, the 1st most populous county in Idaho. The median household income is $91,502 and the median home value is $512,300. The poverty rate is 8.3%.

Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes

Ada County Quick Facts

Population 518,935

Median Household Income $91,502

Median Home Value $512,300

Poverty Rate 8.3%

Unemployment Rate 3.1%

Median Age 38.4 years

Homeownership Rate 70.8%

Affordability Ratio 5.6x

Bachelor's Degree+ 44.6%

High School Graduation 95.2%

Cities/Places 8

Population 518,935 1st of 44

Median Income $91,502 18% higher than state

Poverty Rate 8.3%

Unemployment 3.1%

How Ada County Changed

Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.

Metric	2019–2023	2020–2024	Change
Population	508,052	518,935	+2.1%
Median household income	$88,907	$91,502	+2.9%
Median home value	$476,000	$512,300	+7.6%

Median Household Income

Ada

$91,502

$77,800

National

$80,734

Median Home Value

Ada

$512,300

$418,600

National

$332,700

Economy & Housing

Household Income Distribution

Under $25K 9.8%

$25K-$50K 13.6%

$50K-$100K 31.1%

$100K+ 45.4%

Detailed income brackets

Under $10K

3.1%

$10K-$15K

2.3%

$15K-$20K

1.8%

$20K-$25K

2.6%

$25K-$30K

2.1%

$30K-$35K

2.6%

$35K-$40K

2.7%

$40K-$45K

3.3%

$45K-$50K

3.0%

$50K-$60K

6.2%

$60K-$75K

10.0%

$75K-$100K

14.9%

$100K-$125K

11.5%

$125K-$150K

8.7%

$150K-$200K

10.8%

$200K+

14.4%

Employment

3.1% Unemployment Rate State: 3.7%|National: 5.2%

65.8% Labor Force Participation

Housing Overview

Owner 70.8%

Renter 29.2%

Affordability Index Expensive

5.6x home value to income ratio

Median gross rent $1,577/mo 20.7% of median household income annually

People & Demographics

Age Distribution

Under 18

22.0%

18-34

22.7%

35-54

27.2%

55-74

21.7%

75+

6.4%

Race & Ethnicity

Diversity Index

Low Diversity

A less diverse community where one racial or ethnic group represents a large majority.

State average: 36 | National average: 61

Education

Educational Attainment (Adults 25+)

Cities & Places in Ada County

City	Population	Median Income	Poverty	Home Value
Boise City	237,242	$83,904	10.6%	$484,800
Meridian	130,138	$100,795	6.0%	$531,600
Eagle	32,855	$122,894	6.1%	$772,900
Kuna	27,158	$96,219	6.8%	$423,900
Star	14,745	$97,936	5.8%	$564,300
Garden City	12,654	$70,124	12.0%	$449,500
Hidden Springs	3,378	$163,203	7.2%	$773,500
Avimor	586	$94,306	3.6%	$530,100

Explore Idaho Rankings

Cities by Population All cities ranked by size Richest Cities Ranked by median income Most Educated By bachelor's degree rate Most Affordable By housing affordability

Population Overview

Ada County is located in Idaho with a total population of 518,935. It is the 1st most populous county out of 44 in Idaho. The county encompasses 8 Census-designated places.

Age Demographics

The median age in Ada County is 38.4 years. This is 3% higher than the state median of 37.3 years.

Economy, Income & Housing

The median household income in Ada County is $91,502. This is 18% higher than the state median of $77,800. It is also 13% higher than the national median of $80,734. The poverty rate stands at 8.3%. This is 21% lower than the state poverty rate of 10.6%. The unemployment rate is 3.1%. This is 16% lower than the state rate of 3.7%. The median home value is $512,300. Housing costs are 22% higher than the state median of $418,600. The home-value-to-income ratio is 5.6x. 70.8% of occupied housing units are owner-occupied. This homeownership rate is 2% lower than the state average of 72.1%.

Race & Ethnicity

The largest racial or ethnic group in Ada County is White (non-Hispanic), making up 80.9% of the population. Hispanic or Latino residents account for 9.8%. The Black or African American population is significantly higher than the state average (1.3% vs 0.7%). The Asian population is significantly higher than the state average (2.7% vs 1.3%).

Education

44.6% of residents aged 25 and older hold a bachelor's degree or higher. This places Ada County in the top 10% of all counties in the state for educational attainment. This is 40% higher than the state rate of 31.8%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 95.2%. Notably, 15.6% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All figures for Ada County come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against Idaho and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.

Frequently Asked Questions

What is the population of Ada County, Idaho?

Ada County has a population of 518,935, making it the 1st most populous county in Idaho.

What is the median income in Ada County?

The median household income in Ada County is $91,502 with a poverty rate of 8.3%.

How many cities are in Ada County, Idaho?

Ada County contains 8 Census-designated places.