In search of the correct 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 a variety of options to choose from. These are some of Saint Louis MO zip codes you might be interested in: - Postal code: 63101 - Postal code: 63102 - Postal code: 63103 - Zip code: 63104 - Postal code: 63105 The list goes on, as Saint Louis MO has numerous different zip codes depending on location you are interested in. If you require additional information about Saint Louis MO zip codes, please don't hesitate to ask.