马歇尔县（Wetzel County, West Virginia）是位于美国西维吉尼亚州北部的一个县，西邻俄亥俄州，东北邻宾夕法尼亚州。面积936 平方公里。根据美国2000年人口普查，共有人口17,693人。县治新马丁斯维尔 (New Martinsville)。

成立于1846年1月10日。县名纪念生前屠杀超过100名印第安人的刘易斯·威索 (Lewis Wetzel)。

Wetzel County is a county located in the U.S. state of West Virginia. As of the 2010 census, the population was 16,583. Its county seat is New Martinsville. The county, founded in 1846, is named for Lewis Wetzel, a famous frontiersman and Indian fighter. Its northern border aligns with the Mason-Dixon line but is to the west of the actual Mason-Dixon line.