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