Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — ABOUT

About

zipcodes.pro is a reference for United States ZIP codes: where each one is, which towns, counties and area codes it belongs to, who lives there, and how to get the whole thing as data. It is published by Voitto Virta LLC, a small independent publisher of reference sites built on public data, which also runs QuakeIndex and Nevada Explorer.

What is on each page

  • ZIP codes — the town the Postal Service addresses it as, its county or counties with each one's share, its metro area, time zone, boundary map, Census figures for the people and housing inside it, business and tax activity, and the nearest ZIP codes by real distance.
  • Towns and cities — every ZIP code addressed by the town's name, the ZIP codes that overlap the town without carrying its name, its area codes, the town's own Census profile set against its state and the nation, and nearby towns.
  • Counties and metro areas — every ZIP code and town inside them, with the area's own Census figures, its area codes and the metro area it belongs to.
  • Area codes — where a code's numbers are issued, the places and counties it serves, its overlays and time zone, from the numbering plan administrator's own records.
  • Tools — ZIP codes within a radius, distance between ZIP codes, bulk lookup (which runs entirely in your browser), address to ZIP code and an interactive map.

Where the numbers come from

Every figure is taken from a public-domain or openly licensed source, and the sources page lists each one with its vintage, retrieval date, licence and how many ZIP codes it covers. The main ones:

  • U.S. Census Bureau — ZIP Code Tabulation Area boundaries and areas (TIGER/Line and the Gazetteer), which counties and places each one overlaps, and the American Community Survey 5-year estimates for population, households, income, home values, rent, education and commuting, for every ZIP code, town, county, state and metro area. Business counts come from ZIP Code Business Patterns.
  • Internal Revenue Service — tax returns filed and income reported, by ZIP code.
  • Office of Management and Budget — metropolitan and micropolitan area definitions.
  • North American Numbering Plan Administrator — area codes, overlays and the rate centres each code's numbers are issued to.
  • GeoNames — the place name and location of ZIP codes the Census map does not cover (CC BY 4.0).

How the pages are built

  • ZIP codes are not areas. A ZIP code is a set of mail routes. The Census Bureau approximates each one with a ZIP Code Tabulation Area, and every map and figure on a ZIP code page describes that area, and says so.
  • A town's figures are the town's. A town page shows the Census Bureau's estimate for the town itself, not a sum of the ZIP codes touching it, which would count every ZIP code that crosses the town line in full.
  • A blank is not a zero. Where a source did not publish a figure, the page leaves it out rather than printing a zero that reads as a measurement. ZIP codes that serve only post office boxes or a single organisation have no residents to count, and their pages say so.
  • No generated filler. Sentences on data pages are assembled from the data itself. If a sentence is wrong, the data is wrong, and we want to fix it.
  • Refreshed as the sources are. The data is rebuilt when an upstream source publishes, and every page shows the release it was built from. Changes to ZIP codes between releases are listed under changes.

Getting the data

The REST API has a free tier, and the dataset downloads include a redistribution licence option if you need to ship the data inside your own product.

Corrections and contact

Every message is read by a person. If a figure disagrees with its source, or a town or county is wrong, email [email protected] with the ZIP code or page and the field, or use the contact page. How we handle data about visitors is on the privacy page.