Doss is an unincorporated farming and ranching community at the crossroads juncture of FMs 648 and 783 in northwestern Gillespie County, Texas, United States. It is 19 miles northwest of Fredericksburg and 14 miles northeast of Harper. The zip code is 78618. The mean elevation is 1729 feet. The U.S. Census for year 2000 showed a total population of 225. 1914 Lange's Mill community population was 150.