Gloster is an unincorporated community and census-designated place in DeSoto Parish, Louisiana, United States. As of the 2010 census it had a population of 94.Gloster is located 1.5 miles east of U.S. Route 171, 17 miles north of Mansfield, the DeSoto Parish seat, and 30 miles south of Shreveport. It is the nearest community to three places listed on the U.S. National Register of Historic Places: Myrtle Hill Plantation House Roseneath Thomas Scott House