In search of the correct zip code for Saint Louis MO? Zip codes in Saint Louis MO vary depending on the location. If you need zip codes in Saint Louis MO, you'll find several options to choose from. These are some of the zip codes in Saint Louis MO you might be interested in: - Zip code: 63101 - Postal code: 63102 - Postal code: 63103 - Postal code: 63104 - Zip code: 63105 The list goes on, as St. Louis has numerous different zip codes depending on the area you are interested in. Feel free to ask for more specific details about Saint Louis MO zip codes.