Below is a list of Olmsted IL zip codes. For your research we have also included Olmsted Area Code, Time Zone, UTC and the local Pulaski County FIPS Code. Each Olmsted Illinois zip code has a center Longitude / Latitude point (the Olmsted center is -89.08699798584 / 37.183799743652). For your convenience we have also indicated if that zip code in Olmsted observes Daylight Savings time.