In search of the correct zip code for Saint Louis MO? Saint Louis MO zip codes 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. Here are some of Saint Louis MO zip codes you might be interested in: - Postal 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. If you require additional information about Saint Louis MO zip codes, please don't hesitate to ask.