Below is a list of Grenville SD zip codes. For your research we have also included Grenville Area Code, Time Zone, UTC and the local Day County FIPS Code. Each Grenville South Dakota zip code has a center Longitude / Latitude point (the Grenville center is -97.391403198242 / 45.466999053955). For your convenience we have also indicated if that zip code in Grenville observes Daylight Savings time.