Prairie Grove is a city in Washington County, Arkansas, United States. The population was 7,045 at the 2020 Census. It is part of the Northwest Arkansas region, and home to Prairie Grove Battlefield State Park.

Washington County is a regional economic, educational, and cultural hub in the Northwest Arkansas region. Created as Arkansas's 17th county on November 30, 1848, Washington County has 13 incorporated municipalities, including Fayetteville, the county seat, and Springdale. The county is also the site of small towns, bedroom communities, and unincorporated places. The county is named for George Washington, the first President of the United States.