In search of the correct zip code for Saint Louis MO? Zip codes in Saint Louis MO vary depending on where you are. If you need 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 - Zip code: 63102 - Zip code: 63103 - Zip code: 63104 - Postal code: 63105 The list goes on, as St. Louis has numerous various zip codes depending on location you are interested in. Feel free to ask for more specific details about Saint Louis MO zip codes.