Green Bay, WI ZIP Codes, Area Codes and Address Format

City guides  |  July 4, 2026  |  2 min read

Green Bay sits in Brown County, Wisconsin. It uses 6 standard ZIP codes and the 920 area code.

State

Wisconsin (WI)

County

Brown County

Standard ZIP codes

6

Time zone

Central

Green Bay ZIP codes

These are the standard delivery ZIP codes for Green Bay. The city has 12 ZIP codes in total when PO Box and unique codes are included.

• 54301
• 54302
• 54303
• 54304
• 54311
• 54313

Area codes in Green Bay

Green Bay phone numbers use 920. A single area code keeps local numbers easy to recognize.

Sample Green Bay addresses

The street lines are invented; the city, state and ZIP codes are real. Use them for form testing, mockups and training materials, never for real orders.

How to write an address in Green Bay

• End the address with GREEN BAY, WI and the five-digit ZIP code.
• Put apartment or suite numbers at the end of the street line.
• Use USPS abbreviations such as ST, AVE and BLVD.
• Match the ZIP code to the street. Green Bay has 6 codes, so the city name alone is not enough.

More Wisconsin cities

Marshfield, Brookfield, Milwaukee, Madison, Fond Du Lac, or see all Wisconsin cities.