In search of the correct zip code for Saint Louis MO? Saint Louis MO zip codes vary depending on where you are. In case you are searching for zip codes in Saint Louis MO, you'll find several options to choose from. Below are some of Saint Louis MO zip codes you might be interested in: - Postal code: 63101 - Postal code: 63102 - Postal code: 63103 - Postal code: 63104 - Zip code: 63105 The list goes on, as Saint Louis MO has several different zip codes depending on the area you are interested in. Feel free to ask for more specific details about Saint Louis MO zip codes.