What are the Grindstone, Texas Zip Codes for 2020, 2019Primary Zip Codes for GrindstoneZip CodePrimary CitySecondary City75840FairfieldGrindstone, Turlington, Ward Prairie, YoungCities sharing Zip Codes with GrindstoneZip CodePrimary CitySecondary CityMore Information75840FairfieldGrindstone75840FairfieldTurlington75840FairfieldWard Prairie75840FairfieldYoungAdvertisements