Updated for 2026 Census Data
U.S. ZIP Code & Demographic Directory
Search U.S. ZIP codes across all 50 states to explore population, household income distributions, and boundary maps, and more...
41,500+
Active ZIP Codes
109,000+
Cities & Places
3,200+
U.S. Counties
335M+
Total Population
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How to Use This Directory
Search by 5-Digit ZIP
Enter any full ZIP code (e.g.,
90210 or 10001) to go directly to its demographic report, age profile, and map.
Search by City & State
Type a town name (e.g.,
Austin, TX or Scranton, PA) to see every ZIP code operating within that municipality.
Browse by County
Select your state from the grid below to view counties, list local boundaries, and compare nearby ZIP code statistics.
Browse ZIP Codes by State
Select a state to access its complete list of counties, municipalities, and 5-digit postal zones.
Browse Top Metropolitan Areas
Understanding ZIP Code Types
Standard
Covers regular residential street addresses, businesses, and local delivery routes across a defined area.
PO Box Only
Used exclusively for post office boxes inside a mail facility. Does not represent physical homes or streets.
Unique
Assigned to a single high-volume location, such as a major university, government building, or corporation.
Military (APO/FPO)
Dedicated routes used by the Armed Forces to process overseas military mail through domestic ports.
Frequently Asked Questions
Demographic stats—like population counts, median household income, and age breakdowns—update once a year when the U.S. Census Bureau releases its annual American Community Survey (ACS) estimates.
The Postal Service assigns ZIP codes based on mail volume and delivery routes rather than city borders. Larger cities with high populations or large geographic areas are split into multiple 5-digit zones so local mail carriers can sort and deliver mail quickly.
A standard ZIP code covers street addresses across a physical neighborhood. A PO Box ZIP code is reserved exclusively for mailboxes located inside a specific post office facility and does not represent a residential area.
The extra four digits pinpoint a specific delivery location within a 5-digit ZIP code. They usually mark a specific city block, an apartment building, a group of offices, or an individual high-volume mail receiver.
Military mail uses special state abbreviations—AA (Armed Forces Americas), AE (Armed Forces Europe), and AP (Armed Forces Pacific). The Postal Service treats these as domestic mail, routing packages to military post offices (APO for Army/Air Force, FPO for Navy, DPO for embassies) before shipping them overseas.
Yes. Places that receive massive amounts of mail—such as major university campuses, government headquarters like the Pentagon, or large corporate centers—are assigned their own unique 5-digit ZIP code.
The Postal Service routes mail through regional post offices rather than local municipal borders. If a neighborhood does not have its own main post office, the USPS assigns your street address to a nearby town's post office for mail delivery.
Yes. While most ZIP codes stay within a single county, the Postal Service builds routes for delivery speed, not political boundaries. Many ZIP codes cover parts of multiple counties, and a few border towns cross state lines.
A ZIP code is a delivery route created by the U.S. Postal Service for sorting mail. A ZCTA (ZIP Code Tabulation Area) is a geographic area drawn by the U.S. Census Bureau to track demographic data, population counts, and average income for that mail area.
About Our Data
All demographic metrics, ZIP codes, and geographic boundaries published on zips.us.com are regularly aggregated from official government statistics, including the U.S. Census Bureau, United States Postal Service (USPS), National Weather Service, American Community Survey, and the IRS.