what county is middlefield, oh
Middlefield, Ohio. Middlefield is a village in Middlefield Township, Geauga County, Ohio, United States. The population was 2,694 at the 2010 census. Middlefield is known for being the center of the world's fourth largest Amish settlement, and its significant manufacturing base, which includes Gold Key Processing, Inc., Duncan Toys and KraftMaid.