Boise City Not Located in Boise County, Idaho

The city of Boise is actually in Ada County, while Boise County is home to Idaho City and the Boise National Forest.

Published on Feb. 26, 2026

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Many people assume that the city of Boise is located in Boise County, Idaho, but that is not the case. The city of Boise is actually situated in Ada County, while Boise County is home to the smaller town of Idaho City and the Boise National Forest. The Boise Basin in Boise County was an area of significant growth in the mid-1800s as Idaho was developing into a state, but for some reason the city of Boise ended up in a different county.

Why it matters

This geographic distinction is important to understand, as the city of Boise and Boise County have very different characteristics. The Boise County Sheriff's Office has even posted on social media to try to clear up the differences between the two locations, poking fun at the perceived differences in their demographics and lifestyles.

The details

The city of Boise is an industrialized and relatively modern city for Idaho, while Boise County is almost entirely a mountainous region with just two main roads in its 1,907 square miles. The Boise Basin in Boise County was a major area of growth in the mid-1800s as Idaho was developing, but the city of Boise ended up being located in the separate Ada County.

  • The Boise Basin in Boise County was a huge location of growth in the mid-1860s.
  • In 2026, Boise City will be hosting the Boise Music Fest.

The players

Boise County Sheriff's Office

The law enforcement agency for Boise County, Idaho, which has tried to clarify the differences between Boise City and Boise County on social media.

Idaho City

The main town located within Boise County, Idaho.

Boise National Forest

A national forest located within Boise County, Idaho.

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What’s next

The 2026 Boise Music Fest, set to take place in the city of Boise, will be an opportunity to further highlight the differences between Boise City and Boise County.

The takeaway

This story underscores the importance of understanding local geography, even in seemingly straightforward cases. The distinction between the city of Boise and Boise County is a quirky example of how places with similar names can have very different identities and characteristics.