沃特县（Wirt County, West Virginia）是美国西维吉尼亚州西北部的一个县。面积608平方公里。根据美国2000年人口普查，共有人口5,873人。县治伊利莎白 (Elizabeth)。

成立于1848年1月19日。本县纪念曾任司法部长的威廉·沃特（William Wirt）。

Wirt County is a county located in the U.S. state of West Virginia. As of the 2010 census, the population was 5,717, making it the least populous county in West Virginia. Its county seat is Elizabeth. The county was created in 1848 by the Virginia General Assembly and named for U.S. Attorney General and presidential candidate William Wirt. The county is serviced by one high school, Wirt County High School.