Trying to find the right zip code for Saint Louis MO? Saint Louis MO zip codes vary depending on the location. If you need zip codes in Saint Louis MO, you'll find many options to choose from. Here are some of the zip codes in Saint Louis MO you might be interested in: - Postal code: 63101 - Zip code: 63102 - Zip code: 63103 - Postal code: 63104 - Zip code: 63105 The list goes on, as Saint Louis MO has numerous different zip codes depending on location you are interested in. Feel free to ask for more specific details about Saint Louis MO zip codes.