Below is a list of Royalton IL zip codes. For your research we have also included Royalton Area Code, Time Zone, UTC and the local Franklin County FIPS Code. Each Royalton Illinois zip code has a center Longitude / Latitude point (the Royalton center is -89.114303588867 / 37.876998901367). For your convenience we have also indicated if that zip code in Royalton observes Daylight Savings time.