COUNTY
Ada County
Idaho · 546,141 residents (2025 est.) · 1,052.016 sq mi
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Part of the Boise City metro area
The short version
Ada County is wealthier than most US places, with a median household income of $91,502. The county has grown rapidly, with population up 72% since 2000. Median home value has more than tripled since 2000, reaching $512,300. It ranks in the top 5% of US counties for household income.
At a glance
Wealthier
above the US median
US median: $82,259
Mid-age
median age 38.4
US median: 38.9
More educated
45% hold a bachelor's degree
US average: 36%
Less affordable
home values up 130%, inflation adjusted
US median home: $376,019
Section 01
Population & growth
PEP 2025 EST:546,141 residents (Census Bureau Vintage 2025, released March 2026)
Population, 1990 – 2024
2024519K
Age distribution, 2024
Under 55.1%(26,383)
5 to 96%(30,929)
10 to 146.7%(34,833)
15 to 196.8%(35,546)
20 to 246.2%(32,383)
25 to 3413.9%(72,040)
35 to 4414.4%(74,934)
45 to 5412.8%(66,232)
55 to 6411.8%(61,385)
65 to 749.8%(51,104)
75 to 844.8%(25,143)
85 and over1.5%(8,023)
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy
$91,502
+9%inflation adjusted, since 2000
from $46,140 in 2000
US average: $82,259
1990 – 2024
Households earning $100K+
60.4%
+26.2 ptssince 2009
from 34.2% in 2009
US average: 53.3%
Workforce by industry, 2024
Information11.1%
Retail trade8.9%
Wholesale trade8.2%
Other services7.8%
Public administration4.9%
Finance & insurance4.5%
Professional, scientific, technical3.5%
Transportation & warehousing2.7%
Arts, entertainment, food2.2%
Agriculture, forestry, fishing1.2%
Construction1.1%
Education & health services1%
Manufacturing0.2%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03
Housing
$512,300
+130%inflation adjusted, since 2000
from $122,400 in 2000
US average: $376,019
1990 – 2024
5.6
+51%since 2009
from 3.7 in 2009
2009 – 2024
Our index: median home value divided by median household income. Lower is more affordable.
87
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
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%
2024
White, non-Hispanic80.9%(419,728)
Black1.3%(6,536)
Hispanic / Latino9.8%(50,948)
Asian2.7%(14,215)
Other5.3%(27,508)
42
+45%since 2009
from 29 in 2009
2009 – 2024
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
19
−18%since 2020
from 23 in 2020
Our index, 0 to 100. Higher means White and non-White residents are more separated across neighborhoods.
Section 04 · Origins
Detailed origins & ancestry
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
95.2%
+4.4 ptssince 2000
from 90.8% in 2000
US average: 89.6%
Section 06
Commute & transportation
Section 07
Work & employment
Section 08
People & community
Marital status
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
Canyon County
Income$76,488−16%
Home value$390,000−24%
Population275,123−50%
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ADA COUNTY VS
Elmore County
Income$65,359−29%
Home value$316,500−38%
Population29,465−95%
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ADA COUNTY VS
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Income$64,605−29%
Home value$428,700−16%
Population21,773−96%
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ADA COUNTY VS
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Income$78,774−14%
Home value$476,100−7%
Population8,545−98%
SEE FULL COMPARISON →
Frequently asked
How many people live in Ada County, Idaho?
Ada County, Idaho has about 518,935 residents according to the 2024 American Community Survey.
What is the median household income in Ada County, Idaho?
The typical household in Ada County, Idaho earns about $91,502 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 $512,300, and the typical rent is about $1,577 a month.
How educated are people in Ada County, Idaho?
About 44.6% 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 8.3% 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 313,160 residents, a change of about 152 percent over that period.
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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