Montgomery County is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 535,153, making it the fifth-most populous county in Ohio. The county seat is Dayton. The county was named in honor of Richard Montgomery, an American Revolutionary War general killed in 1775 while attempting to capture Quebec City, Canada. Montgomery County is part of the Dayton, Ohio Metropolitan Statistical Area.
The Montgomery County Commissioners have affirmed their commitment to peace and the legacy of Dayton’s peace history. Each year, the Commissioners plan an event around International Day of Peace, including the Honoring Our Veterans events and the cleanup of the Greencastle Cemetery, the oldest cemetery in Dayton.