Largest ZIP Code – Continental US

Largest ZIP

in continental US

The largest ZIP Code in the continental U.S. is 99734, Prudhoe Bay, AK, at 30,683 square miles.

* | Tags: Fun facts USPS Fact #969 | March 21, 2022

Twenty-four of the top 25 largest ZIP Codes in the country are located in Alaska – ranging from the largest, 99734, at more than 30,000 square miles to 99741 at 7,600 square miles. The 14th spot goes to Nevada, 89049.