United States › Idaho › Ada County COUNTY · 2000 CENSUS
Ada County Idaho · 300,904 residents · 1,052 sq mi
Time machine
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The short version
Ada County is home to 300,904 people in Idaho. Growth has run 46% since 1990, or 95,129 more people. That is roughly 23% ahead of the Idaho median. About 31% of adults have finished a four-year degree. The average commute runs 11 minutes. The poverty rate is 7.7%, under the national 12.4%.
At a glance
Wealthier
above the US median
US median: $42,589
Younger
median age 32.8
US median: 35.2
More educated
31% hold a bachelor's degree
US average: 24%
Less affordable
home values up 32%, inflation adjusted
US median home: $120,530
Section 01
Population & growth from 31.9 in 1990
US average: 35.2
Population, 1990 – 2024
174K 268K 362K 456K 550K 1990 2000 2010 2020 2024 Ada County Age distribution, 2000
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Section 02
Income & economy $46,140
+16%inflation adjusted, since 1990
from $30,246 in 1990
US average: $42,589
from $14,268 in 1990
US average: $21,522
from 8.8% in 1990
US average: 12.4%
$122,400
+32%inflation adjusted, since 1990
from $70,400 in 1990
US average: $120,530
$617
+17%inflation adjusted, since 1990
from $401 in 1990
US average: $602
from 69.1% in 1990
29.3% rent
Section 04
Race & ethnicity 1990
White, non-Hispanic 96.8%(199,254)
Hispanic / Latino 2.5%(5,216)
2000
White, non-Hispanic 90.6%(272,569)
Hispanic / Latino 4.5%(13,467)
No data for the years selected.
Section 04 · Origins
Detailed origins & ancestry Detailed origin tables are available for 2024; showing 2024 data.
Hispanic origin
+ 9 more hispanic origin groups with data Asian origin
+ 8 more asian origin groups with data Ancestry
+ 49 more ancestry groups with data from 24.9% in 1990
US average: 24.4%
High school or higher
from 87.2% in 1990
US average: 80.3%
from 7.4% in 1990
US average: 8.8%
Section 06
Commute & transportation from 17.2 min in 1990
US average: 17.6
Section 07
Work & employment No data for the years selected.
Section 08
People & community No data for the years selected.
Marital status
Men 15+
Never married 27.6%(31,923)
Women 15+
Never married 20.7%(24,177)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2000
Section 09
Health coverage Showing 2024 (the nearest year with coverage data).
from 13.0% in 2013
US average: 8.4%
from 62.0% in 2020
US average: 54.8%
Direct-purchase
from 17.4% in 2020
US average: 13.8%
from 15.5% in 2020
US average: 18.4%
from 11.2% in 2020
US average: 20.9%
VA health care
from 2.8% in 2020
US average: 2.2%
Any private
from 78.8% in 2020
US average: 67.1%
Any public
from 25.6% in 2020
US average: 36.7%
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans Veterans by period of service, 2024
Gulf War (2001 or later) 30.7%(9,675)
Gulf War (1990s) 27.9%(8,800)
Share of the 31,500 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
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Drill deeper
Places similar to Ada County Head to head
Compare Ada County to nearby counties ADA COUNTY VS
Canyon County
Income $76,488 +66%
Home value $390,000 +219%
Population 275,123 −50%
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ADA COUNTY VS
Elmore County
Income $65,359 +42%
Home value $316,500 +159%
Population 29,465 −95%
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ADA COUNTY VS
Gem County
Income $64,605 +40%
Home value $428,700 +250%
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ADA COUNTY VS
Boise County
Income $78,774 +71%
Home value $476,100 +289%
Population 8,545 −98%
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Frequently asked
How many people live in Ada County, Idaho? Ada County, Idaho has about 300,904 residents according to the 2000 Census.
What is the median household income in Ada County, Idaho? The typical household in Ada County, Idaho earns about $46,140 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 $122,400, and the typical rent is about $617 a month.
How educated are people in Ada County, Idaho? About 31.2% 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 7.7% of people in Ada County, Idaho live below the federal poverty line.
Has Ada County, Idaho grown since 1990? Yes, Ada County, Idaho has grown since 1990. The population has added about 95,129 residents, a change of about 46 percent over that period.
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