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 a variety of options to choose from. These are some of Saint Louis MO zip codes you might be interested in: - Postal code: 63101 - Zip code: 63102 - Postal code: 63103 - Zip code: 63104 - Postal code: 63105 The list goes on, as St. Louis has several various zip codes depending on the area you are interested in. Let me know if you need more specific information about Saint Louis MO zip codes.