In search of the correct zip code for Saint Louis MO? Saint Louis MO zip codes vary depending on where you are. 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: - Zip code: 63101 - Postal code: 63102 - Postal code: 63103 - Postal code: 63104 - Postal code: 63105 The list goes on, as Saint Louis MO has several various zip codes depending on the area you are interested in. Let me know if you need more specific information about Saint Louis MO zip codes.