As of the 2020 census, the county had a population of 494,967, which by 2022 was estimated to have risen to 518,907. Ada County is by far the state's most ...

Ada County, Idaho. QuickFacts provides statistics for all states and counties. Also for cities and towns with a population of 5,000 or more.

Ada County is the largest county by population in Idaho. We are home to approximately 27% of the state's population.

Ada County, Idaho's estimated 2024 population is 530,342 with a growth rate of 1.08% in the past year according to the most recent United States census data.

Ada County, Idaho · Populations and People. Total Population · Income and Poverty. Median Household Income · Education. Bachelor's Degree or Higher · Employment.

The population of Ada County, Idaho in 2022 was 518,907, 31.9% up from the 393,369 who lived there in 2010. For comparison, the US population grew 7.7% and ... How has the population... · How has Ada County's racial...