Below is a list of Round Lake Beach IL zip codes. For your research we have also included Round Lake Beach Area Code, Time Zone, UTC and the local Lake County FIPS Code. Each Round Lake Beach Illinois zip code has a center Longitude / Latitude point (the Round Lake Beach center is -88.092498779297 / 42.35179901123). For your convenience we have also indicated if that zip code in Round Lake Beach observes Daylight Savings time.