Welcome to
Dayton’s Imagination District

Since 1858, the fairgrounds site at the intersection of Stewart and Main streets served as a community destination and was once the economic and innovation engine of Dayton and the region’s agricultural showplace.


OnMain is a place that embodies the best of Dayton; as we were, as we are today, and as we’ll forever be. A place where tinkerers will tinker. Inventors will invent. Dreamers will dream. A place where curious and open minds come together to work, live and play. It’s a place that sparks innovation and echoes Dayton’s can-do, creative spirit. A place with a distinctive identity and personality and a vibe that is open, welcoming, and inclusive for everyone. It’s a place where people of all cultures and backgrounds go to learn and discover, to play and relax, to work and to live. To be.

 Innovate onMain
 Live onMain
 Work onMain
 Play onMain


onMain Identity
Frequently Asked Questions


Program Elements
Phases and Buildout
Actions Underway


Press Releases
Project News