Ada County, Idaho Population 2020

Ada County, Idaho's estimated population is 456,885 with a growth rate of 2.71% in the past year according to the most recent United States census data. Ada County, Idaho is the largest county in Idaho.

Year Population Growth Growth Rate
2018469,96613,0812.86%
2017456,88512,0612.71%
2016444,82411,7772.72%
2015433,0477,5071.76%
2014425,5409,4602.27%
2013416,0807,1501.75%
2012408,9307,6951.92%
2011401,2357,8852.00%
2010393,350187,57591.16%
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%

How Many People Live in Ada County, Idaho?

456,885

Ada County, Idaho Population Growth

Population by Race

Race Population Percentage
White404,64490.72%
Two or More Races13,3703.00%
Asian11,9562.68%
Some Other Race6,4451.44%
Black or African American6,2041.39%
American Indian and Alaska Native2,5250.57%
Native Hawaiian and Other Pacific Islander9080.20%

Ada County, Idaho Population Pyramid 2020

Ada County, Idaho Median Age

36.7


Total

36


Male

37.5


Female

Ada County, Idaho Adults

There are 336,905 adults, (60,097 of whom are seniors) in Ada County, Idaho.

Ada County, Idaho Age Dependency

61.1

Age Dependency Ratio

21.7

Old Age Dependency Ratio

39.4

Child Dependency Ratio

Ada County, Idaho Sex Ratio

Female

222,685

49.92%

Male

223,367

50.08%

Ada County, Idaho Households and Families

Ada County, Idaho Renter vs Owner Occupied by Household Type

Ada County, Idaho Household Types

Type Owner Renter
Married83.2%16.8%
All68.4%31.6%
Male62.1%37.9%
Non Family52.9%47.1%
Female48.9%51.1%

68.4%

Rate of Home Ownership

Type Count Average Size Owned
All168,7412.5968.4
Married85,8403.2883.2
Non Family62,0231.3252.9
Female13,9953.5448.9
Male6,8833.5562.1

3.25

Average Family Size

2.59

Average Household Size

5%

Unmarried (Opposite Sex)

0.4%

Unmarried (Same Sex)

Ada County, Idaho Education

Education Attained Count Percentage
Less Than 9th Grade4,2311.42%
9th to 12th Grade10,2663.44%
High School Graduate68,55422.98%
Some College74,35224.93%
Associates Degree28,2439.47%
Bachelors Degree75,37025.27%
Graduate Degree37,27012.49%

Ada County, Idaho Educational Attainment by Race

Name Total High School Bachelors
White261,755252,120101,636
Hispanic18,81115,6263,545
Asian8,1647,1504,000
Multiple Races5,5695,2972,322
Other Race4,2283,191537
Black2,9892,585825
Native American1,7401,605239
Islander685685310

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 49.00%.

Name Average Male Female
Overall$40,266$49,047$32,420
Less Than High School$24,128$27,237$16,692
High School Grad$30,653$35,044$23,870
Some College$35,298$42,183$28,794
Bachelors Degree$50,836$63,001$39,417
Graduate Degree$67,500$85,214$53,304

$40,266

Average Earnings

$49,047

Average Male

$32,420

Average Female

Ada County, Idaho Language

Ada County, Idaho Language by Age

Ada County, Idaho Language

91.50% of Ada County, Idaho residents speak only English, while 8.50% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 4.04% of the population.

Ada County, Idaho Poverty

Ada County, Idaho Poverty by Race

Name Total In Poverty Poverty Rate
White372,53836,2979.74%
Hispanic34,1756,27718.37%
Black5,9512,13335.84%
Multiple13,1751,96614.92%
Asian11,8341,53913.00%
Other6,25897215.53%
Islander87333137.92%
Native2,23326711.96%

10.97%

Overall Poverty Rate

10.23%

Male Poverty Rate

11.70%

Female Poverty Rate

Poverty in Ada County, Idaho

The race most likely to be in poverty in Ada County, Idaho is Islander, with 37.92% below the poverty level.

The race least likely to be in poverty in Ada County, Idaho is White, with 9.74% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.27%. Among those working part-time, it was 16.81%, and for those that did not work, the poverty rate was 18.94%.

Name Poverty
Less Than High School23.72%
High School13.83%
Some College9.17%
Bachelors or Greater4.05%
Name Poverty
Female Unemployed24.06%
Male Unemployed22.91%
Female Employed7.83%
Male Employed5.32%

Ada County, Idaho Income

Ada County, Idaho Income by Household Type

Name Median Mean
Households$63,137$84,735
Families$80,854$104,480
Married Families$91,051$116,739
Non Families$35,274$48,194

Ada County, Idaho Marital Status

Ada County, Idaho Marital Status

Marriage Rates

52.0%

Overall Marriage Rate

52.5%

Male Marriage Rate

51.5%

Female Marriage Rate

Ada County, Idaho Married by Age and Sex

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

Ada County, Idaho Veterans

29,466

Number of Veterans

26,715

Male Veterans

2,751

Female Veterans

War Veterans
Vietnam10,252
First Gulf War7,146
Second Gulf War6,088
Korea2,393
World War II983
Name Veterans % of Total
White27,9179.07%
Hispanic1,1264.83%
2 or More4526.31%
Other3567.20%
Asian3193.51%
Black2496.53%
Indian1667.64%
Hawaiian70.84%

$Ada County, Idaho Veterans by Education

7.39%

Veteran Poverty Rate

25.90%

Veteran Disability Rate

Ada County, Idaho Employment Status

66%

Labor Force Participation

63.2%

Employment Rate

3.8%

Unemployment Rate

Ada County, Idaho Place of Birth

Origin of Non-Citizens

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

46.20%

Born in Idaho

94.22%

Native Born

5.78%

Foreign Born

2.89%

Non Citizen

Place of Birth

94.22% of Ada County, Idaho residents were born in the United States, with 46.20% having been born in Idaho. 2.89% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

  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