高卢县（Gallia County, Ohio）是美国俄亥俄州南部的一个县，南隔俄亥俄河与西维吉尼亚州相望。面积1,200平方公里。根据美国2000年人口普查，共有人口31,069人。县治加利波利斯 (Gallipolis)。

成立于1803年3月25日。本县以殖民者的故乡、法国的拉丁语名字高卢命名。

Gallia County (pronunciation: GAL-yuh) is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 30,934. Its county seat is Gallipolis. Its name is the Latin word for "France." Gallia County is also known by nickname "Little Cardiganshire".