What are the Cobalt City, Missouri Zip Codes for 2020, 2019Primary Zip Codes for Cobalt CityZip CodePrimary CitySecondary City63645FredericktownCobalt City, Womack, Mine La Motte, MillcreekCities sharing Zip Codes with Cobalt CityZip CodePrimary CitySecondary CityMore Information63645FredericktownMillcreek63645FredericktownCobalt City63645FredericktownWomack63645FredericktownMine La Motte Mine La Motte population stats Advertisements