Discover Mahaska County, Iowa: History, Attractions, and More!

Mahaska County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 14,378. The county seat is Oskaloosa. The county was founded on January 15, 1843 and named after the Mahaska River, which runs through the county.

Mahaska is a name derived from the Ioway language, meaning "smoky" or "hazy". It was used by early French explorers to describe the haze that rose from the prairies in the summer months. The river was named after the Mahaska tribe, who lived along its banks.

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