Ada County , Idaho
Ada County: County in Idaho, United States
About
Ada County is a county located in the U.S. state of Idaho. As of the 2010 census, the population was 392,365 and a population density of 143 people per km². After 9 years in 2019 county had an estimated population of 481,587 inhabitants. Its county seat is Boise. The county was created 157 years ago in 1864.
Ada County Quick Facts
Population : | 481,587 (2019) |
Country : | United States of America |
State : | Idaho (United States) |
Area : | 2746 km2 |
Water as percent of area : | 0.7% |
Land as percent of area : | 99.3% |
Named for : | Ada Riggs |
Altitude : | 3,179 feet / 969 meters |
Capital : | Boise |
Establishment : | December 12, 1864 |
Time Zone : | America/Boise |
Local time : | 11:21:04 (20th May 2022) |
Density : | 175 Pop. per km² as of 2019 |
Population growth : | 18.53% (2010-2019) |



Geography
Ada County is located at 43°27'4"N 116°14'28"W (43.4511200, -116.2410900). It has 5 neighbors: Elmore County, Boise County, Canyon County, Gem County and Owyhee County.
Ada County map
The largest city of Ada County is Boise with a population of 228,959. Other cities include, Meridian population 114,161, Eagle population 29,796, Kuna population 22,257 and Garden City population 11,969. See all Ada County cities & populated places.
Ada County Populated Places
Cities, Towns, Neighborhoods & Other Populated Places in Ada County.
City Name | Population | Title |
---|---|---|
Boise | 228,959 | City in and state capital of Idaho, United States |
Meridian | 114,161 | City in Ada County, Idaho, United States |
Eagle | 29,796 | City in Ada County, Idaho, United States |
Kuna | 22,257 | City in Ada County, Idaho, United States |
Garden City | 11,969 | City in Ada County, Idaho, United States |
Star | 10,532 | City in Ada County, Idaho, United States |
- Official Website
Official website of Ada County
Ada County has 5 neighbours.
- Elmore County county in Idaho, United States
- Boise County county in Idaho, United States
- Canyon County county in Idaho, United States
- Gem County county in Idaho, United States
- Owyhee County county in Idaho, United States
- Boise
Demographics
The population of Ada County increased by 18.53% in 9 years.
Year | Population | % Change | Method |
2010 | 392,365 | - | census |
2011 | 401,262 | 2.22% | estimation process |
2012 | 408,862 | 1.86% | estimation process |
2013 | 415,951 | 1.7% | estimation process |
2014 | 425,471 | 2.24% | estimation process |
2015 | 432,862 | 1.71% | estimation process |
2016 | 444,486 | 2.62% | estimation process |
2017 | 456,548 | 2.64% | estimation process |
2018 | 468,764 | 2.61% | estimation process |
2019 | 481,587 | 2.66% | estimation process |
Idaho Other Counties (more counties)
County Name | Population | Title |
---|---|---|
Canyon County | 229,849 | County in Idaho, United States |
Boise | 228,959 | City in and state capital of Idaho, United States |
Kootenai County | 165,697 | County in Idaho, United States |
Bonneville County | 119,062 | County in Idaho, United States |
Meridian | 114,161 | City in Ada County, Idaho, United States |
Nampa | 99,277 | City in Canyon County, Idaho, United States |
Bannock County | 87,808 | County in Idaho, United States |
Twin Falls County | 86,878 | County in Idaho, United States |
Idaho Falls | 62,888 | City in and the county seat of Bonneville County, Idaho, United States |
Caldwell | 58,481 | City in and county seat of Canyon County, Idaho, United States |
Pocatello | 56,637 | City in Idaho |
Coeur d'Alene | 52,414 | City in Idaho, United States |
Twin Falls | 50,197 | City in Twin Falls County, Idaho, United States |
Bingham County | 46,811 | County in Idaho, United States |
Bonner County | 45,739 | County in Idaho, United States |
Nez Perce County | 40,408 | County in Idaho, United States |