COUNTY · 1990 CENSUS

Ada County

Idaho · 205,775 residents · 1,052.016 sq mi

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The short version

Ada County has roughly average household income, with a median household income of $30,246. Population has fallen 32% since 2000, a loss of 95,129 residents. Median home value is $70,400.

At a glance

Average income

near the US median

US median: $30,130

Mid-age

median age 31.9

US median: 33.0

More educated

25% hold a bachelor's degree

US average: 20%

More affordable

home values down 24%, inflation adjusted

US median home: $93,722

Section 01

Population & growth

Total population

205,775

−32%vs 2000

vs 300,904 in 2000

1990 – 2025

Population density

196 / sq mi

−32%vs 2000

vs 286 / sq mi in 2000

US average: 221

Median age

31.9

−3%vs 2000

vs 32.8 in 2000

US average: 33.0

Population, 1990 – 2024

2024519K

Section 02

Income & economy

Median household income

$30,246

−14%inflation adjusted, since 2000

vs $46,140 in 2000

US average: $30,130

1990 – 2024

Per capita income

$14,268

−37%vs 2000

vs $22,519 in 2000

US average: $14,340

Poverty rate

8.8%

+1.2 ptsvs 2000

vs 7.7% in 2000

US average: 13.2%

Section 03

Housing

Median home value

$70,400

−24%inflation adjusted, since 2000

vs $122,400 in 2000

US average: $93,722

1990 – 2024

Median gross rent

$401

−14%inflation adjusted, since 2000

vs $617 in 2000

US average: $450

Owner-occupied

69.1%

−1.6 ptsvs 2000

vs 70.7% in 2000

30.9% rent

Afford Score

2.3

−12%vs 2000

vs 2.7 in 2000

1990 – 2024

RELATED:See current rent listings in Ada County on RentDataNow

Section 04

Race & ethnicity

2000

White, non-Hispanic90.6%(272,569)

Black0.6%(1,829)

Hispanic / Latino4.5%(13,467)

Asian1.7%(5,140)

Other0%

Diversity Score16.5%(49,713)

1990

White, non-Hispanic96.8%(199,254)

Black0.6%(1,161)

Hispanic / Latino2.5%(5,216)

Asian1.2%(2,386)

Other1.4%(2,974)

Diversity Score13.4%(27,572)

Diversity Score

−19%vs 2000

vs 17 in 2000

1990 – 2024

Section 05

Education

Bachelor's degree or higher

24.9%

−6.3 ptsvs 2000

vs 31.2% in 2000

US average: 20.3%

High school or higher

87.2%

−3.6 ptsvs 2000

vs 90.8% in 2000

US average: 75.2%

Graduate degree

7.4%

−2.1 ptsvs 2000

vs 9.5% in 2000

US average: 7.1%

Section 06

Commute & transportation

Average commute

17.2 min

+51%vs 2000

vs 11.4 min in 2000

US average: 21.9

Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

Drill deeper

Places similar to Ada County

Head to head

Compare Ada County to nearby counties

ADA COUNTY VS

Canyon County

Income$76,488+153%

Home value$390,000+454%

Population275,123−50%

SEE FULL COMPARISON →

ADA COUNTY VS

Elmore County

Income$65,359+116%

Home value$316,500+350%

Population29,465−95%

SEE FULL COMPARISON →

ADA COUNTY VS

Gem County

Income$64,605+114%

Home value$428,700+509%

Population21,773−96%

SEE FULL COMPARISON →

ADA COUNTY VS

Boise County

Income$78,774+160%

Home value$476,100+576%

Population8,545−98%

SEE FULL COMPARISON →

Frequently asked

How many people live in Ada County, Idaho?

Ada County, Idaho has about 205,775 residents according to the 1990 Census.

What is the median household income in Ada County, Idaho?

The typical household in Ada County, Idaho earns about $30,246 a year. Half of households make more than that, and half make less.

Is Ada County, Idaho expensive?

In Ada County, Idaho, the median home is worth about $70,400, and the typical rent is about $401 a month.

How educated are people in Ada County, Idaho?

About 24.9% of adults age 25 and over in Ada County, Idaho hold a bachelor's degree or higher.

What is the poverty rate in Ada County, Idaho?

About 8.8% of people in Ada County, Idaho live below the federal poverty line.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →