Warren County

Warren County is an administrative division in southwestern Ohio spanning roughly 401 square miles and containing suburban and rural communities. The area sits within the Cincinnati metropolitan region and blends developed neighborhoods with farmland and open spaces.

The county was created in 1803 when it was separated from adjacent Hamilton County territory. It was named after Dr. Joseph Warren, a figure who played a role in the American Revolution.

The Warren County Historical Museum displays objects and records that show how the region's communities have grown and changed over time. Visitors can see what daily life was like for people who lived here across different periods.

The area offers recreation including Kings Island amusement park, Caesar Creek State Park, and the Little Miami Scenic Trail for day trips. Its location near Cincinnati provides easy access with good roads and facilities for outdoor activities throughout the county.

The Mason Business Center, a major research and development facility in the area, employs thousands and contributes significantly to the local economy. The site is known as one of the largest research operations for a global consumer goods company.

Location: Ohio

Inception: March 24, 1803

Capital city: Lebanon

Reference: WAR

Part of: Cincinnati metropolitan area

Shares border with: Montgomery County, Clermont County, Butler County, Hamilton County, Clinton County, Greene County

Website: https://co.warren.oh.us

GPS coordinates: 39.43000,-84.17000

Latest update: December 14, 2025 21:06