In search of the correct zip code for Saint Louis MO? Saint Louis MO zip codes vary depending on where you are. In case you are searching for zip codes in Saint Louis MO, you'll find many options to choose from. These are some of Saint Louis MO zip codes you might be interested in: - Zip code: 63101 - Zip code: 63102 - Zip code: 63103 - Postal code: 63104 - Zip code: 63105 The list goes on, as St. Louis has numerous different zip codes depending on location you are interested in. If you require additional information about Saint Louis MO zip codes, please don't hesitate to ask.