Mayville is a village in Chautauqua County, New York, United States. The population was 1,709 at the 2010 census, which is down 2.7 rom the 2000 census. The Mayville is in the town of Chautauqua and is the county seat of Chautauqua County. The village and town offices share a building on Main Street, directly across from the Chautauqua County courthouse.