where is germantown oh
Sponsored Topics. Germantown is a village in Montgomery County, Ohio, United States. The population was 4,884 at the 2000 census. It is part of the Dayton Metropolitan Statistical Area. Germantown is located at 39Â°37â²38â³N 84Â°21â²57â³W / 39.62722Â°N 84.36583Â°W / 39.62722; -84.36583 (39.627133, -84.365951). According to the United States Census Bureau, the village has a total area of 3.6 square miles (9.3 kmÂ²), all of it land.