What are the Iron Mountain, South Dakota Zip Codes for 2020, 2019Primary Zip Codes for Iron MountainZip CodePrimary CitySecondary City57544KennebecIron Mountain, Houston,Cities sharing Zip Codes with Iron MountainZip CodePrimary CitySecondary CityMore Information57544KennebecHouston57544KennebecIron MountainAdvertisements