In search of the correct zip code for Saint Louis MO? Saint Louis MO zip codes vary depending on where you are. If you need zip codes in Saint Louis MO, you'll find numerous options to choose from. Below are some of the zip codes in Saint Louis MO 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 Saint Louis MO has numerous various zip codes depending on location you are interested in. Let me know if you need more specific information about Saint Louis MO zip codes.