what county is plainfield in
Plainfield is a town in Guilford, Liberty and Washington townships, Hendricks County, Indiana, United States. The population was 27,631 at the 2010 census. Plainfield is located at 39Â°41â²51â³N 86Â°23â²5â³W / 39.6975Â°N 86.38472Â°W / 39.6975; -86.38472 (39.697471, -86.384672).