Montgomery County, Ohio Business Directory & Community Resources
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View the 2025 U.S. Census demographic profile for Montgomery County
Montgomery County — County Seat: Dayton
2026 Population Estimate: 542,266 | Official Website: https://www.mcohio.org/
Montgomery County is one of Ohio's largest urban counties, anchored by the city of Dayton — birthplace of aviation, a major military-industrial city, and one of America's great mid-sized cities. Dayton is defined by the legacy of the Wright Brothers, who invented and flew the first powered airplane here; the National Museum of the United States Air Force at nearby Wright-Patterson Air Force Base is the world's largest aviation museum and one of Ohio's most visited attractions. The county is home to a remarkable density of innovation: it leads the nation in patents per capita. Major employers include Wright-Patterson AFB (the largest single-site employer in Ohio, with over 30,000 workers), Kettering Health, Premier Health, CareSource (major Medicaid managed care), and Reynolds and Reynolds. The Dayton Art Institute and Boonshoft Museum of Discovery are beloved cultural assets. Dayton is also home to the University of Dayton.
▸ Key Industries & Major Employers
Advanced manufacturing, aerospace, defense, healthcare, and professional services.
Major employers include Premier Health, Kettering Health Network, Wright-Patterson Air Force Base (adjacent, in Greene County but dominant in Montgomery's economy), NCR Corporation, Reynolds & Reynolds, CareSource, and the University of Dayton. Dayton is known as the birthplace of aviation and a hub for defense and aerospace R&D.
▸ Notable Economic Development Initiatives
The Dayton Development Coalition coordinates economic strategy. The Entrepreneurs' Center supports startup growth. A 2024 innovation investment by CareSource expanded the health-tech workforce. The AFRL Collaborate on October initiative links WPAFB R&D with local startups. Kettering Health's investment in a new hospital campus is underway. Downtown Dayton revitalization continues through developer and city investment.
▸ Infrastructure & Investment Highlights
I-75, I-70, and I-675 form the highway network. Dayton International Airport (DAY) serves cargo and regional passenger travel. The Great Miami River corridor is being developed for recreation and mixed-use projects. Dayton RTA provides regional transit. The county is investing in downtown water and sewer infrastructure to support urban redevelopment.