Portage, IN ZIP Code
Portage, Indiana has one ZIP code: .
Mail addressed to Portage covers nearby places too.
Where the 46368 ZIP code reaches
Tap or point to an area to see its ZIP code.Full-size map
Dashed line: Portage city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
Check an address in Portage
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?
ZIP codes from nearby towns that reach into Portage
- 46403, mailing town Gary, covers 4 percent of Portage
Why your mail may say Portage when you live outside it
Portage ZIP codes also cover Ogden Dunes and Portage Township, so a letter addressed to Portage can go to a home outside the city limits.
The reverse happens too: parts of Portage use 46403, which mails under a neighboring town's name.
A ZIP code does not set your city, school district or tax. Porter County property records show which city you are in.
Portage ZIP code questions
What is the main ZIP code for Portage?
46368, the ZIP code of the main Portage post office at 2701 Willowcreek Rd.
What county is Portage in?
Porter County.
ZIP codes for towns near Portage
More towns near Portage: Calumet City, Oak Lawn, Chicago, Tinley Park, Cicero, Orland Park, Berwyn, Oak Park, Evanston.
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