Below is a list of National Stock Yards IL zip codes. For your research we have also included National Stock Yards Area Code, Time Zone, UTC and the local Saint Clair County FIPS Code. Each National Stock Yards Illinois zip code has a center Longitude / Latitude point (the National Stock Yards center is -90.159599304199 / 38.644798278809). For your convenience we have also indicated if that zip code in National Stock Yards observes Daylight Savings time.