Below is a list of Roslyn SD zip codes. For your research we have also included Roslyn Area Code, Time Zone, UTC and the local Day County FIPS Code. Each Roslyn South Dakota zip code has a center Longitude / Latitude point (the Roslyn center is -97.493598937988 / 45.500301361084). For your convenience we have also indicated if that zip code in Roslyn observes Daylight Savings time.