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Home >> State of Idaho >> Ada County  

Welcome to Ada County ...

Time Zone: Ada County lies in the Mountain Time Zone (MST/MDT) and observes daylight saving time.

The community of Boise is the Seat for Ada County. Boise is also the capital of Idaho.

Ada County was founded in 1864 and was created by taking area from Boise County.

From the Census Estimates for 2019, <1> Ada had a population of 481,587 people. This is an increase of 22.43% since the last Census (which gave a population of 393,354 people in 2010).

At the time of the 2010 Census, Ada represented 25.09% of the total population of Idaho.

Below are some of the communities located in Ada County:

  • Boise
    (5 miles [8 km] to the northeast)
    • Boise is located in Ada County (ID)
    • Jump to our Gazetteer entry for Boise
    • Population from the 2020 Census: 229,776 people
    • Former name for Boise:
    • Boise City
    • Jump to TripAdvisor's Tourism page for Boise <2>
  • Eagle
    (10 miles [16.1 km] to the north)
    • Eagle is located in Ada County (ID)
    • Jump to our Gazetteer entry for Eagle
    • Population from the 2020 Census: 31,699 people
    • Jump to TripAdvisor's Tourism page for Eagle <2>
  • Garden City
    (7 miles [11.3 km] to the north)
  • Kuna
    (8 miles [12.9 km] to the southwest)
    • Kuna is located in Ada County (ID)
    • Jump to our Gazetteer entry for Kuna
    • Population from the 2020 Census: 23,937 people
    • Jump to TripAdvisor's Tourism page for Kuna <2>
  • Meridian
    (6 miles [9.7 km] to the northwest)
  • Star
    (14 miles [22.5 km] to the northwest)
    • Star is located in Ada County (ID)
    • Jump to our Gazetteer entry for Star
    • Population from the 2020 Census: 11,259 people
    • Jump to TripAdvisor's Tourism page for Star <2>

Websites of Interest ...

Footnotes ...

<1>On a yearly basis, the US Census Bureau creates an estimate of the county's population. Keep in mind that this is an estimate and not an actual count. The last physical count was the 2010 Census and the next count will be for the 2020 Census. For more information, please visit the U.S. Census Bureau.
<2>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.