COUNTY · 1990 CENSUS
Ada County
Idaho · 205,775 residents · 1,052.016 sq mi
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Part of the Boise City metro area
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
Population, 1990 – 2024
2024519K
Age distribution, 1990
Under 57.6%(15,722)
5 to 98.4%(17,189)
10 to 147.9%(16,336)
15 to 197.1%(14,649)
20 to 246.9%(14,291)
25 to 3417.8%(36,545)
35 to 4417.3%(35,522)
45 to 549.7%(20,045)
55 to 646.8%(14,057)
65 to 746.1%(12,573)
75 to 843.4%(7,014)
85 and over0.9%(1,832)
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy
$30,246
−14%inflation adjusted, since 2000
vs $46,140 in 2000
US average: $30,130
1990 – 2024
Section 03
Housing
$70,400
−24%inflation adjusted, since 2000
vs $122,400 in 2000
US average: $93,722
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%
1990
White, non-Hispanic96.8%(199,254)
Black0.6%(1,161)
Hispanic / Latino2.5%(5,216)
Asian1.2%(2,386)
Other1.4%(2,974)
No data for the years selected.
Section 04 · Origins
Detailed origins & ancestry
Detailed origin tables are available for 2024; showing 2024 data.
Hispanic origin
Mexican7%(36,231)
South American0.7%(3,442)
Puerto Rican0.4%(2,200)
Central American0.4%(2,030)
Spaniard0.4%(1,850)
Colombian0.2%(1,207)
Peruvian0.2%(1,176)
Guatemalan0.2%(858)
Salvadoran0.1%(709)
Cuban0.1%(651)
Ecuadorian0.1%(354)
Venezuelan0.1%(347)
+ 9 more hispanic origin groups with data
Dominican0%(223)
Argentine0%(216)
Panamanian0%(209)
Nicaraguan0%(112)
Costa Rican0%(104)
Paraguayan0%(64)
Chilean0%(57)
Bolivian0%(21)
Honduran0%(20)
Asian origin
Asian Indian0.5%(2,678)
Chinese0.4%(2,189)
Filipino0.3%(1,789)
Korean0.3%(1,522)
Vietnamese0.3%(1,423)
Japanese0.2%(1,148)
Kazakh0.1%(778)
Nepalese0.1%(515)
Laotian0.1%(421)
Pakistani0.1%(298)
Thai0.1%(280)
Taiwanese0%(121)
+ 8 more asian origin groups with data
Burmese0%(109)
Indonesian0%(85)
Cambodian0%(63)
Bangladeshi0%(42)
Malaysian0%(38)
Sri Lankan0%(35)
Singaporean0%(16)
Hmong0%(8)
Pacific Islander origin
Native Hawaiian0.2%(918)
Chamorro0.1%(384)
Samoan0.1%(355)
Marshallese0%(152)
Tongan0%(134)
Guamanian0%(50)
Fijian0%(15)
Ancestry
English19.8%(102,556)
German18%(93,607)
Irish11.4%(59,205)
American4.3%(22,141)
Italian4.2%(21,805)
Scottish3%(15,800)
Norwegian2.9%(15,009)
Swedish2.6%(13,495)
French2.3%(12,107)
Polish1.8%(9,531)
Dutch1.6%(8,377)
Danish1.4%(7,119)
+ 49 more ancestry groups with data
Welsh1.3%(6,496)
Scotch-Irish0.9%(4,507)
British0.7%(3,670)
Russian0.6%(3,327)
Subsaharan African0.6%(3,288)
French Canadian0.6%(3,001)
Arab0.6%(2,967)
Swiss0.6%(2,929)
Portuguese0.5%(2,810)
Ukrainian0.5%(2,373)
Czech0.4%(2,229)
Hungarian0.3%(1,724)
Greek0.3%(1,627)
Finnish0.3%(1,546)
Canadian0.2%(1,192)
Austrian0.2%(833)
Croatian0.2%(785)
Lebanese0.1%(756)
Romanian0.1%(717)
Iraqi0.1%(670)
Lithuanian0.1%(627)
West Indian0.1%(542)
Iranian0.1%(465)
Belgian0.1%(424)
Slovak0.1%(342)
Serbian0.1%(334)
Israeli0.1%(330)
Armenian0.1%(327)
Somali0.1%(300)
Syrian0.1%(280)
Turkish0%(246)
Slovene0%(230)
Australian0%(219)
Nigerian0%(216)
Haitian0%(201)
Ethiopian0%(167)
Bulgarian0%(158)
Egyptian0%(156)
Brazilian0%(148)
Latvian0%(131)
Trinidadian & Tobagonian0%(127)
Jamaican0%(118)
Palestinian0%(63)
Ghanaian0%(52)
Moroccan0%(48)
Guyanese0%(33)
Cape Verdean0%(30)
Macedonian0%(15)
Kenyan0%(7)
Section 05
Education
High school or higher
87.2%
−3.6 ptsvs 2000
vs 90.8% in 2000
US average: 75.2%
Section 06
Commute & transportation
Section 07
Work & employment
No data for the years selected.
Section 08
People & community
No data for the years selected.
Marital status (2024)
Men 15+
Never married33.6%(71,985)
Married54.4%(116,615)
Widowed1.9%(4,041)
Divorced10.1%(21,622)
Women 15+
Never married26.5%(56,309)
Married53.5%(113,636)
Widowed6.9%(14,717)
Divorced13.1%(27,865)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
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Compare Ada County to nearby counties
ADA COUNTY VS
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Income$76,488+153%
Home value$390,000+454%
Population275,123−50%
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ADA COUNTY VS
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Income$65,359+116%
Home value$316,500+350%
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ADA COUNTY VS
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ADA COUNTY VS
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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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129 census tracts (top 20 by population)
Census Tract 105.01Census Tract 104.07Census Tract 101.02Census Tract 103.41Census Tract 102.29Census Tract 2.02Census Tract 103.42Census Tract 9.02Census Tract 102.30Census Tract 104.10Census Tract 103.54Census Tract 104.08Census Tract 103.67Census Tract 104.06Census Tract 24.16Census Tract 103.58Census Tract 103.37Census Tract 103.63Census Tract 103.64Census Tract 103.6216 ZIP codes
ZIP 83646ZIP 83642ZIP 83709ZIP 83704ZIP 83634ZIP 83706ZIP 83616ZIP 83713ZIP 83714ZIP 83705ZIP 83702ZIP 83703ZIP 83669ZIP 83712ZIP 83720ZIP 83725Up the hierarchy
All counties in IdahoDATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024