Lelia Lake is an unincorporated community in central Donley County, Texas, United States. As of the 2020 census, Lelia Lake had a population of 51. It lies along U.S. Route 287, southeast of the city of Clarendon, the county seat of Donley County. Although Lelia Lake is unincorporated, it has a post office, with the ZIP code of 79240.