Ada County, ID Population

Overview

485,246

Total Population

37.7

Median age

49.70%

Female population %

101.2:100

Gender ratio (M:F)

35-39 years

Largest age group

51.0

Total dependency ratio

White

Largest racial group

42,203

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

Ada County's population is young compared to the rest of the country:

The median age in Ada County is 37.7, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Ada County's population under 18 was 23.38%, compared to the 22.51% nationwide.
Ada County's elderly or the senior population (over 65 age) was 14.67% as compared to 16.04% nationwide.
Of the total population in Ada County, 19.09% were under the age of 15, 19.71% aged 15 to 29, 46.54% aged 30 to 64, 13.30% aged 65 to 84, and 1.37% were 85 years of age and older.

There are 2,958 less females than males in Ada County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 49.70% females and 50.30% males in Ada County, ID.
The Ada County, ID gender ratio is 101.2:100 i.e. 101.2 men to 100 women (1.012).
For male population, the largest age group is 10-14 years with a population of 18,853.
For the female population, the largest age group is 35-39 years with a population of 18,590.

Ada County's population has become increasingly diverse:

Racial distribution of Ada County population: 87.64% are White, 1.30% are Black or African American, 0.59% are American Indian and Alaska Native, 2.57% are Asian, 0.23% are Native Hawaiian and other Pacific Islander, 2.13% are some other race and 5.54% are multiracial.
Ada County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 42,203 is Hispanic or Latino (of any race), and 443,043 (91.30% of the total population) is Non-Hispanic.
The largest racial group in Ada County is White with a population of 425,267 (87.64% of the total population).

Ada County's population has not reached its peak yet and is showing a trend of further growth:

The peak population was 518,907 in the year 2022
From 2000 to 2010, Ada County's population increased by 90,044 (29.69%), as compared to the national growth of 9.63%.
From 2010 to 2020, Ada County's population increased by 104,891 (26.66%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
Between the year 2000 and 2022, Ada County's population was lowest in year 2000 at 303,325.