U.S. ZIP Code Boundary Map
View official U.S. Census Bureau 2020 ZIP Code Tabulation Area (ZCTA) boundaries on an interactive map. Enter any 5-digit ZIP Code, search a U.S. city or street address, or click anywhere on the map to highlight that ZIP Code’s polygon and see every county it overlaps.
Zoom in (to level 12+) or enter a 5-digit ZIP Code / city to view ZIP Code boundaries.
County Coverage Shares for This ZIP Code Area
How the Interactive U.S. ZIP Code Boundary Map Works
This interactive U.S. ZIP Code map combines two official U.S. Census Bureau datasets: live vector and raster polygon boundaries from the TIGERweb tigerWMS_Current MapServer Layer 2 (2020 Census 5-Digit ZIP Code Tabulation Areas), and the 2020 ZCTA-to-County Relationship File covering 33,791 five-digit ZCTAs across all 50 states, the District of Columbia, and Puerto Rico. You can explore boundaries in three ways:
- Search Any 5-Digit ZIP Code, City, or Street Address: Entering a 5-digit ZIP Code (such as
27601,10001, or97756) queries TIGERweb Layer 2 directly by itsZCTA5attribute, flies to the polygon at any zoom level, and outlines the exact boundary in blue. Entering a city or street address centers on that location and queries the intersecting ZCTA polygon. - Zoom In to Level 12+ for Neighborhood Boundary Overlays: Because rendering all 33,791 national ZCTA polygons at once would overwhelm mobile browsers, the map displays a clean zoom notice at regional scales and automatically overlays live TIGERweb ZCTA boundary lines and 5-digit labels across the entire viewport as soon as you zoom to level 12 or closer.
- Click Anywhere on the Map to Inspect a ZIP Code Area: Clicking any point on the map queries the Census ZCTA polygon at those coordinates, highlights its boundary, and lists every county that shares land area with that ZIP Code.
Why Roughly One in Four ZIP Codes Crosses County Lines
USPS 5-digit ZIP Codes are designed around postal carrier delivery routes rather than county or city borders. As a result, approximately 25% of U.S. ZIP Codes span two or more counties. Whenever you select a ZIP Code on this map, QuickWhere displays the exact percentage of the ZCTA’s land area that falls inside each overlapping county. Need to find all ZIP Codes inside a mileage circle or measure the distance between two ZIP Codes? Use ZIP Codes in a Radius Finder, Distance Between Two ZIP Codes, What ZIP Code Am I In?, or ZIP Code to County Lookup.