Douglas City is an unincorporated community in Trinity County, California first settled during the California Gold Rush. Douglas City sits at an elevation of 2,152 feet. The ZIP Code is 96024. The community is inside area code 530. Its population is 868 as of the 2020 census, up from 713 from the 2010 census. For statistical purposes, the United States Census Bureau has defined Douglas City as a census-designated place. The Whiskeytown–Shasta–Trinity National Recreation Area is nearby.