Winston is an unincorporated community, formerly incorporated as a city, in southwestern Douglas County, Georgia, United States.Winston is assigned the United States Postal Service ZIP code 30187. ZIP Code 30187 has segments in two counties, Carroll and Douglas.Winston is located at 33°44′N 84°52′W / 33.73°N 84.86°W / 33.73; -84.86 which is 33°43′48″N 84°51′36″W / 33.73000°N 84.86000°W / 33.73000; -84.86000.