Below is a list of Mound City IL zip codes. For your research we have also included Mound City Area Code, Time Zone, UTC and the local Pulaski County FIPS Code. Each Mound City Illinois zip code has a center Longitude / Latitude point (the Mound City center is -89.162803649902 / 37.085098266602). For your convenience we have also indicated if that zip code in Mound City observes Daylight Savings time.