Below is a list of West Alton MO zip codes. For your research we have also included West Alton Area Code, Time Zone, UTC and the local Saint Charles County FIPS Code. Each West Alton Missouri zip code has a center Longitude / Latitude point (the West Alton center is -90.208396911621 / 38.870800018311). For your convenience we have also indicated if that zip code in West Alton observes Daylight Savings time.