Hammond, IN ZIP Codes
Hammond, Indiana has 6 ZIP codes: 5 for street addresses (, , , and ) and 1 for PO boxes ().
Your street decides which one you use.
Which Hammond ZIP code is my address in?
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Hammond ZIP code map
Tap or point to an area to see its ZIP code.Full-size map
46325 has no area on the map: it is a PO box or single-organization ZIP code. Dashed line: Hammond city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
All Hammond ZIP codes by type
| ZIP | Type and post office or station |
|---|---|
| 46320 | street delivery Hammond Sorting and Delivery Center |
| 46323 | street delivery Hessville |
| 46324 | street delivery South Calumet Avenue |
| 46325 | PO boxes at the Hammond Sorting and Delivery Center post office Hammond Sorting and Delivery Center |
| 46327 | street delivery Hammond Sorting and Delivery Center |
| 46394 | street delivery; mail may be addressed to Whiting Whiting |
Why your mail may say Hammond when you live outside it
Hammond ZIP codes also cover Whiting, so a letter addressed to Hammond can go to a home outside the city limits.
A ZIP code does not set your city, school district or tax. Lake County property records show which city you are in.
Hammond ZIP code questions
What is the main ZIP code for Hammond?
46320, the ZIP code of the main Hammond Sorting and Delivery Center post office at 5530 Sohl Ave.
Which Hammond ZIP codes are for PO boxes only?
46325. Mail to it goes to boxes at the post office, not to street addresses.
What county is Hammond in?
Lake County.
ZIP codes for towns near Hammond
More towns near Hammond: Crown Point, Chicago, Orland Park, Cicero, Berwyn, Oak Park, Valparaiso, Woodridge, Downers Grove.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections