In search of the correct zip code for Saint Louis MO? Saint Louis MO zip codes vary depending on the location. If you are looking for zip codes in Saint Louis MO, you'll find several options to choose from. Here 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 several 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.