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World Population Review
Ada County, Idaho Population 2021
Ada County, Idaho's estimated population is 507,233 with a growth rate of 2.59% in the past year according to the most recent United States census data. Ada County, Idaho is the 2nd largest county in Idaho. The 2010 Population was 393,354 and has seen a growth of 28.95% since this time.
Note: 2020 and 2021 data is projected
| Year | Population | Growth | Growth Rate |
|---|---|---|---|
| 2021 | 507,233 | 12,823 | 2.59% |
| 2020 | 494,410 | 12,823 | 2.66% |
| 2019 | 481,587 | 12,823 | 2.74% |
| 2018 | 468,764 | 12,216 | 2.68% |
| 2017 | 456,548 | 12,062 | 2.71% |
| 2016 | 444,486 | 11,624 | 2.69% |
| 2015 | 432,862 | 7,391 | 1.74% |
| 2014 | 425,471 | 9,520 | 2.29% |
| 2013 | 415,951 | 7,089 | 1.73% |
| 2012 | 408,862 | 7,600 | 1.89% |
| 2011 | 401,262 | 7,908 | 2.01% |
| 2010 | 393,354 | 187,579 | 91.16% |
| 1990 | 205,775 | 32,739 | 18.92% |
| 1980 | 173,036 | 60,806 | 54.18% |
| 1970 | 112,230 | 18,770 | 20.08% |
| 1960 | 93,460 | 22,811 | 32.29% |
| 1950 | 70,649 | 20,248 | 40.17% |
| 1940 | 50,401 | 12,476 | 32.90% |
| 1930 | 37,925 | 2,712 | 7.70% |
| 1920 | 35,213 | 6,125 | 21.06% |
| 1910 | 29,088 | 17,529 | 151.65% |
| 1900 | 11,559 | 3,191 | 38.13% |
| 1890 | 8,368 | 3,694 | 79.03% |
| 1880 | 4,674 | 1,999 | 74.73% |
| 1870 | 2,675 | 0.00% |
2021 Growth Rate
2.59%
County Website
State
Founded
December 22, 1864
County Seat
Lat./Long.
2010 Population
393,354
Growth Since 2010
28.95%
Ada County, Idaho Population Growth
| Race | Population | Percentage |
|---|---|---|
| White | 413,350 | 90.48% |
| Two or More Races | 15,397 | 3.37% |
| Asian | 11,617 | 2.54% |
| Some Other Race | 6,965 | 1.52% |
| Black or African American | 6,274 | 1.37% |
| American Indian and Alaska Native | 2,407 | 0.53% |
| Native Hawaiian and Other Pacific Islander | 839 | 0.18% |
Ada County, Idaho Population by Race
Ada County, Idaho Population Pyramid $2021
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Ada County, Idaho Population by Age
Ada County, Idaho Households and Families
| Type | Count | Average Size | Owned |
|---|---|---|---|
| All | 173,353 | 2.58 | 69.3 |
| Married | 88,356 | 3.25 | 83.8 |
| Non Family | 63,288 | 1.33 | 53.8 |
| Female | 14,568 | 3.48 | 51.7 |
| Male | 7,141 | 3.59 | 63.5 |
3.22
Average Family Size
2.58
Average Household Size
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Ada County, Idaho Households by Type
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| Education Attained | Count | Percentage |
|---|---|---|
| Less Than 9th Grade | 4,306 | 1.40% |
| 9th to 12th Grade | 10,592 | 3.44% |
| High School Graduate | 68,859 | 22.37% |
| Some College | 74,881 | 24.32% |
| Associates Degree | 30,613 | 9.94% |
| Bachelors Degree | 78,620 | 25.54% |
| Graduate Degree | 39,984 | 12.99% |
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Ada County, Idaho Educational Attainment by Sex (over 25)
Ada County, Idaho Educational Attainment by Race
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| Race | Total | High School | Bachelors |
|---|---|---|---|
| White | 269,061 | 259,293 | 106,388 |
| Hispanic | 20,018 | 16,601 | 3,934 |
| Asian | 8,290 | 7,244 | 4,073 |
| 2+ Races | 6,720 | 6,422 | 3,114 |
| Other Race | 4,472 | 3,496 | 717 |
| Black | 2,897 | 2,578 | 809 |
| Native American | 1,805 | 1,624 | 359 |
| Islander | 665 | 665 | 222 |
The highest rate of high school graduation is among islander people with a rate of 100.00%.
The highest rate of bachelors degrees is among asian people with a rate of 49.13%.
Ada County, Idaho Educational Attainment by Race
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$41,097
Average Earnings
$49,973
Average Male
$33,981
Average Female
Ada County, Idaho Earnings by Educational Attainment
Ada County, Idaho Language by Age
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Ada County, Idaho Language
91.31% of Ada County, Idaho residents speak only English, while 8.69% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 4.28% of the population.
Ada County, Idaho Language
Ada County, Idaho Poverty by Race
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| Name | Total | In Poverty | Poverty Rate |
|---|---|---|---|
| White | 379,929 | 37,114 | 9.77% |
| Hispanic | 35,564 | 5,901 | 16.59% |
| Black | 6,035 | 2,219 | 36.77% |
| Multiple | 15,132 | 1,755 | 11.60% |
| Asian | 11,489 | 1,720 | 14.97% |
| Other | 6,706 | 985 | 14.69% |
| Native | 2,070 | 567 | 27.39% |
| Islander | 808 | 321 | 39.73% |
10.85%
Overall Poverty Rate
10.16%
Male Poverty Rate
11.52%
Female Poverty Rate
Poverty in Ada County, Idaho
The race most likely to be in poverty in Ada County, Idaho is Islander, with 39.73% below the poverty level.
The race least likely to be in poverty in Ada County, Idaho is White, with 9.77% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 2.06%. Among those working part-time, it was 16.18%, and for those that did not work, the poverty rate was 19.16%.
Ada County, Idaho Poverty
Ada County, Idaho Poverty Rate by Education
Ada County, Idaho Marital Status
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Marriage Rates
52.0%
Overall Marriage Rate
52.5%
Male Marriage Rate
51.4%
Female Marriage Rate
Ada County, Idaho Married by Age and Sex
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Ada County, Idaho Marriage
The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 35-44.
Ada County, Idaho Marital Status by Race
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Ada County, Idaho Marital Status
Ada County, Idaho Veterans by War
Ada County, Idaho Veterans by Age
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| Name | Veterans | % of Total |
|---|---|---|
| White | 28,091 | 8.89% |
| Hispanic | 1,263 | 5.10% |
| 2+ Races | 602 | 7.08% |
| Other Race | 432 | 7.71% |
| Asian | 393 | 4.33% |
| Black | 220 | 5.75% |
| Native American | 179 | 8.59% |
| Islander | 7 | 0.90% |
Ada County, Idaho Veterans by Race
Ada County, Idaho Veterans by Education
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6.34%
Veteran Poverty Rate
26.35%
Veteran Disability Rate
Ada County, Idaho Veterans by Education
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66.4%
Labor Force Participation
63.5%
Employment Rate
3.9%
Unemployment Rate
Ada County, Idaho Employment by Age
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Ada County, Idaho Employment by Race
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Ada County, Idaho Employment by Education
Origin of Non-Citizens
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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Origin of Naturalized Citizens
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94.17%
Native Born
5.83%
Foreign Born
2.84%
Non Citizen
2.99%
Naturalized
Place of Birth
94.17% of Ada County, Idaho residents were born in the United States, with 44.99% having been born in Idaho. 2.84% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.
Ada County, Idaho Place of Birth
- US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
- Population of States and Counties of the United States: 1790 - 1990