In search of the correct zip code for Saint Louis MO? Saint Louis MO zip codes vary depending on where you are. If you need zip codes in Saint Louis MO, you'll find several options to choose from. Here are some of the zip codes in Saint Louis MO you might be interested in: - Zip code: 63101 - Postal code: 63102 - Zip code: 63103 - Postal code: 63104 - Zip code: 63105 The list goes on, as St. Louis has several different zip codes depending on the area you are interested in. If you require additional information about Saint Louis MO zip codes, please don't hesitate to ask.