Warren County, Ohio Business Directory & Community Resources
View a map of Warren County
View the 2025 U.S. Census demographic profile for Warren County
Warren County — County Seat: Lebanon
2026 Population Estimate: 259,323 | Official Website: https://www.warrencountyohio.gov/
Warren County is one of Ohio's fastest-growing counties, situated between Cincinnati and Dayton in the booming southwestern Ohio I-71 corridor, with Lebanon as its charming county seat. The county has experienced extraordinary population growth driven by suburban expansion from Cincinnati — particularly in communities like Mason, Deerfield Township, and Monroe — and has become one of the most economically dynamic regions in Ohio. Kings Island — one of the largest amusement parks in the United States — is located in Mason, drawing over 3 million visitors annually and serving as a major regional economic anchor. Major employers include Cincinnati Children's Hospital (Mason campus), Mason City Schools (one of Ohio's top-rated districts), Mercy Health - Kings Mills Hospital, and an enormous array of corporate offices, distribution centers, and retail operations along I-71. The Golden Lamb Inn in Lebanon — Ohio's oldest continuously operating hotel (1803) — is a state landmark.
▸ Key Industries & Major Employers
Automotive, distribution, healthcare, and retail.
Warren County is one of Ohio's fastest-growing counties. Major employers include Atrium Medical Center, Kings Island (amusement park, major seasonal employer), Amazon distribution centers, and a growing automotive supplier cluster tied to Honda of America. The county hosts several distribution centers attracted by the I-71 corridor.
▸ Notable Economic Development Initiatives
Warren County is experiencing rapid population and commercial growth. The Warren County Port Authority coordinates economic development. Kings Island's ongoing capital investment (new attractions, resort expansion) drives hospitality employment. The Cincinnati Premium Outlets and other major retail developments generate sales tax revenue and retail employment. JobsOhio and REDI Cincinnati coordinate investment with the county.
▸ Infrastructure & Investment Highlights
I-71 is the primary artery. SR-48 and US-22 provide secondary access. The county is expanding water and sewer infrastructure to support continued residential and commercial growth. Two new I-71 interchange improvements are planned to support the growing distribution center cluster.
