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 null 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
2021507,23312,8232.59%
2020494,41012,8232.66%
2019481,58712,8232.74%
2018468,76412,2162.68%
2017456,54812,0622.71%
2016444,48611,6242.69%
2015432,8627,3911.74%
2014425,4719,5202.29%
2013415,9517,0891.73%
2012408,8627,6001.89%
2011401,2627,9082.01%
2010393,354187,57991.16%
1990205,77532,73918.92%
1980173,03660,80654.18%
1970112,23018,77020.08%
196093,46022,81132.29%
195070,64920,24840.17%
194050,40112,47632.90%
193037,9252,7127.70%
192035,2136,12521.06%
191029,08817,529151.65%
190011,5593,19138.13%
18908,3683,69479.03%
18804,6741,99974.73%
18702,6750.00%
2021 Growth Rate
2.59%
County Website
State
Founded
December 22, 1864
County Seat
2010 Population
393,354
Growth Since 2010
28.95%
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Ada County, Idaho Population Growth

Population by Race

Race Population Percentage
White413,35090.48%
Two or More Races15,3973.37%
Asian11,6172.54%
Some Other Race6,9651.52%
Black or African American6,2741.37%
American Indian and Alaska Native2,4070.53%
Native Hawaiian and Other Pacific Islander8390.18%
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Ada County, Idaho Population By Race

Ada County, Idaho Population Pyramid 2021

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Ada County, Idaho Median Age

37


Total

36.3


Male

37.8


Female

Ada County, Idaho Adults

There are 347,052 adults, (63,734 of whom are seniors) in Ada County, Idaho.

Ada County, Idaho Age Dependency

61.2

Age Dependency Ratio

22.5

Old Age Dependency Ratio

38.8

Child Dependency Ratio

Ada County, Idaho Sex Ratio

Mujer

227,963

49.90%

Masculino

228,886

50.10%

Ada County, Idaho Population by Age

Ada County, Idaho Renter vs Owner Occupied by Household Type

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Ada County, Idaho Household Types

Type Owner Renter
Married83.8%16.2%
All69.3%30.7%
Masculino63.5%36.5%
Non Family53.8%46.2%
Mujer51.7%48.3%

69.3%

Rate of Home Ownership

Ada County, Idaho Households and Families

Type Count Average Size Owned
All173,3532.5869.3
Married88,3563.2583.8
Non Family63,2881.3353.8
Mujer14,5683.4851.7
Masculino7,1413.5963.5

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 Grade4,3061.40%
9th to 12th Grade10,5923.44%
High School Graduate68,85922.37%
Some College74,88124.32%
Associates Degree30,6139.94%
Bachelors Degree78,62025.54%
Graduate Degree39,98412.99%
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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
White269,061259,293106,388
Hispanic20,01816,6013,934
Asian8,2907,2444,073
2+ Races6,7206,4223,114
Other Race4,4723,496717
Black2,8972,578809
Native American1,8051,624359
Islander665665222

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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Name Average Masculino Mujer
Overall$41,097$49,973$33,981
Less Than 9th Grade$22,819$26,502$16,493
High School Graduate$31,783$35,517$26,302
Some College$36,450$43,956$30,265
Bachelors Degree$51,074$63,720$39,852
Graduate Degree$68,577$84,974$58,227

$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
White379,92937,1149.77%
Hispanic35,5645,90116.59%
Black6,0352,21936.77%
Multiple15,1321,75511.60%
Asian11,4891,72014.97%
Other6,70698514.69%
Native2,07056727.39%
Islander80832139.73%

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

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Name Poverty
Less Than 9th Grade24.63%
High School12.63%
Some College9.66%
Bachelors or Greater4.13%

Ada County, Idaho Poverty Rate by Education

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Name Poverty
Female Unemployed26.76%
Male Unemployed23.52%
Female Employed7.26%
Male Employed5.15%

Ada County, Idaho Poverty Rate by Employment Status and Sex

Ada County, Idaho Income by Household Type

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Name Median Mean
Households$66,293$88,757
Families$84,884$108,720
Married Families$95,250$121,155
Non Families$37,385$51,198
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Income by Household Type

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

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29,924

Number of Veterans

26,976

Male Veterans

2,948

Female Veterans

War Veterans
Vietnam9,987
First Gulf War7,068
Second Gulf War6,642
Korea2,268
World War II800

Ada County, Idaho Veterans by War

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Age Group Veterans
35 to 547,940
65 to 746,844
75+6,061
55 to 645,955
18 to 343,124

Ada County, Idaho Veterans by Age

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Name Veterans % of Total
White28,0918.89%
Hispanic1,2635.10%
2+ Races6027.08%
Other Race4327.71%
Asian3934.33%
Black2205.75%
Native American1798.59%
Islander70.90%

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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44.99%

Born in Ada County, Idaho

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

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990

Sources