Zip Code Listings for Hammond, Indiana The following are the areas codes and zip codes for Hammond, Indiana 46320 (area code: 219)
46321 (area code: 219)
46322 (area code: 219)
46323 (area code: 219)
46324 (area code: 219)
46325 (area code: 219)
46327 (area code: 219)