Distance Between Two ZIP Codes
Calculate the straight-line distance in miles, kilometers, and nautical miles between any two 5-digit U.S. ZIP Codes using official U.S. Census Bureau 2020 ZCTA internal centroids.
Enter two locations above or choose a sample pair to compute the straight-line (as-the-crow-flies) distance.
Straight-line (as-the-crow-flies) distance: This calculation measures the shortest spherical great-circle path over the Earth's surface, not driving road mileage or turn-by-turn travel time.
Great-Circle Path & Endpoint Details
Halfway point calculator Distance between cities Crow-flies distance Distance between ZIP Codes Radius map
How Distance Between Two U.S. ZIP Codes Is Measured
This calculator computes the straight-line great-circle distance between any two 5-digit U.S. ZIP Codes by looking up each code’s official internal point coordinates (INTPTLAT and INTPTLON) from the U.S. Census Bureau’s 2020 ZIP Code Tabulation Areas (ZCTA5) Gazetteer and applying the haversine formula on the IUGG mean Earth sphere (R = 6,371,008.8 meters). Results are reported in statute miles, kilometers, and nautical miles along with the initial compass bearing and midpoint coordinates.
Understanding ZCTA Centroids and Large Rural ZIP Codes
A 5-digit ZIP Code is not a single point on the ground—it represents an entire postal delivery area that can range from a few city blocks in Manhattan (such as 10001) to hundreds of square miles in rural Nevada, Montana, or Alaska:
- Centroid-to-Centroid Measurement: Every distance reported here is measured between the official Census internal point of the first ZCTA and the official internal point of the second ZCTA.
- Adjacent or Overlapping Addresses: Two houses sitting across the street from each other on a ZIP Code boundary may be only 100 feet apart even though the centroids of their two ZIP Codes are 4 to 8 miles apart. When you need door-to-door precision for zoning or school proximity rules, use As the Crow Flies Distance with full street addresses.
- PO Box-Only ZIP Codes: Certain 5-digit USPS codes are assigned solely to Post Office boxes or single high-volume buildings and do not have a Census ZCTA polygon; if a PO Box ZIP Code is not in the 33,791 ZCTA dataset, enter the post office’s street address or city instead.
Common Uses for ZIP-to-ZIP Distance Lookups
Freight and parcel zone estimation, regional sales territory rules, healthcare provider network adequacy standards, and employee relocation stipends routinely define eligibility by straight-line mileage between 5-digit ZIP Codes. Need to list every ZIP Code inside a given mileage circle around your business? Use our ZIP Codes in a Radius Finder or inspect boundaries on the U.S. ZIP Code Boundary Map.