Below is a list of South Sioux City NE zip codes. For your research we have also included South Sioux City Area Code, Time Zone, UTC and the local Dakota County FIPS Code. Each South Sioux City Nebraska zip code has a center Longitude / Latitude point (the South Sioux City center is -96.414001464844 / 42.464500427246). For your convenience we have also indicated if that zip code in South Sioux City observes Daylight Savings time.