怀恩多特县（Wyandot County, Ohio）是美国俄亥俄州中北部的一个县。面积1,056平方公里。根据美国2000年人口普查，共有人口22,908人。县治上桑达斯基 (Upper Sandusky)。

成立于1845年2月3日。县名来自怀恩多特族 (即西方人称为休伦族的印第安人)。

Wyandot County is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 22,615. Its county seat is Upper Sandusky. Its name comes from the Wyandot Indians and is variously translated from their language as "around the plains" and "dwellers on the peninsula".