Below is a list of Lake Saint Louis MO zip codes. For your research we have also included Lake Saint Louis Area Code, Time Zone, UTC and the local Saint Charles County FIPS Code. Each Lake Saint Louis Missouri zip code has a center Longitude / Latitude point (the Lake Saint Louis center is -90.793998718262 / 38.780498504639). For your convenience we have also indicated if that zip code in Lake Saint Louis observes Daylight Savings time.