Madison County, Ohio Business Directory & Community Resources
View a map of Madison County
View the 2025 U.S. Census demographic profile for Madison County
Madison County — County Seat: London
2026 Population Estimate: 48,182 | Official Website: https://www.co.madison.oh.us/
Madison County is a west-central Ohio county, centered on London as the county seat. The county sits in the heart of Ohio's most productive agricultural land and has experienced some growth as a suburban extension of the Columbus metropolitan area. The county's most distinctive feature economically is the presence of several major correctional facilities — including the Madison Correctional Institution and the London Correctional Institution, Amazon (Logistics & Distribution), Stanley Electric (US), and Jefferson Industries Corp. — which are significant employers in the region. Honda of America's presence in neighboring Union County spills economic activity into Madison County. The county has a pleasant agricultural character with flat glaciated terrain, and its proximity to Columbus via I-70 and US-40 (the National Road — the first federally funded highway in American history, which cuts through the county) makes it increasingly attractive for residential development and logistics operations.
▸ Key Industries & Major Employers
Agriculture, distribution, manufacturing, and food processing.
Major employers include Madison Health, Nestle (large facility), and growing distribution and logistics operations driven by proximity to Columbus. Agriculture—grains and livestock—is economically significant. The Correctional Center is a major public employer.
▸ Notable Economic Development Initiatives
Madison County Economic Development is actively marketing the county's proximity to Columbus and its large available industrial land base. JobsOhio has assisted in attracting distribution center development along the I-70 corridor. Several food processing investments have been supported through state incentives.
▸ Infrastructure & Investment Highlights
I-70 is the primary artery, providing excellent logistics access. US-40 and SR-38 provide secondary connections. Water and sewer capacity is being expanded to attract industrial users. The county is a target area for Columbus-area logistics overflow development.