In search of the correct zip code for Saint Louis MO? Zip codes in Saint Louis MO vary depending on the location. In case you are searching for zip codes in Saint Louis MO, you'll find several options to choose from. These are some of Saint Louis MO zip codes you might be interested in: - Postal code: 63101 - Zip code: 63102 - Zip code: 63103 - Postal code: 63104 - Zip code: 63105 The list goes on, as St. Louis has numerous various zip codes depending on location you are interested in. Let me know if you need more specific information about Saint Louis MO zip codes.