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 — RANKINGS

ZIP code rankings

Every list says what it measures, in what units, from which source, and what its thresholds exclude. A ranking with fewer than 10 qualifying ZIP codes is not published for that state.

Highest average income

Total adjusted gross income divided by the number of tax returns filed. This is income per RETURN, not per person or per household — a return can be a single filer or a married couple.

Lowest average income

Total adjusted gross income divided by tax returns filed, lowest first. ZIP codes with fewer than 200 returns are excluded: the IRS suppresses small cells and the remainder swing too wildly to rank.

Most tax returns filed

Number of individual income tax returns filed. A rough proxy for how many households a ZIP code contains, available where census figures are not.

Largest by land area

Land area of the Census tabulation area, in square miles. Water is excluded.

Smallest by land area

Land area of the Census tabulation area, smallest first. These are almost always dense urban ZIP codes covering a few city blocks.

Highest median household income

Median household income, American Community Survey 5-year estimate.

Highest median home value

Median value of owner-occupied homes, ACS 5-year estimate.

Highest median gross rent

Median gross rent, ACS 5-year estimate. Includes utilities where the tenant pays them.

Largest population

Population of the Census tabulation area, ACS 5-year estimate.

Highest population density

People per square mile of land area.

Oldest median age

Median age of residents, ACS 5-year estimate.

Youngest median age

Median age of residents, lowest first.