ZIP codes by state

41,107 ZIPs in 50 states, DC and Puerto Rico. Pick one for its map and full list.

Every state, at a glance

Questions people actually ask

How are ZIP codes assigned to states?

The first digit of a ZIP is a group of states, from 0 in the Northeast to 9 on the West Coast, and the first three digits are a sorting center. A few ZIPs serve one state from another state’s center, so prefixes can overlap a border.

Which state has the most ZIP codes?

Texas and California each have about 2,600 ZIP codes in use, followed by Pennsylvania and New York with about 2,150 each. Rhode Island and Delaware have under 100.

Do these lists include PO Box ZIP codes?

Yes. Each state list includes PO Box, single-building and organization ZIPs, marked “PO Box”. They have no delivery area, so they show up as points on the map.

Updated 2026-11-10 · Where the data comes from