What are the Gravel Beach, Indiana Zip Codes for 2020, 2019Primary Zip Codes for Gravel BeachZip CodePrimary CitySecondary City46747HudsonGravel Beach, Salem Center, HelmerCities sharing Zip Codes with Gravel BeachZip CodePrimary CitySecondary CityMore Information46747HudsonHelmer46747HudsonGravel Beach46747HudsonSalem CenterAdvertisements