People per sq mi
ZIP code population
People, age, income and density for any ZIP, and how it ranks against every other ZIP in the US.
US leaderboards
The ZIPs that top the charts
From the ACS 2020–2024 5-year estimates. Tap any of them in the leaderboard above to fly there.
140,157
people in 77494, Katy TX
most populous ZIP
163,590
per sq mi in 10028, NYC
densest ZIP
16.9
median age in 79908, El Paso
youngest (Fort Bliss)
13,680
sq mi in 99557, Aniak AK
biggest ZIP by land
What a ZIP’s stats can and can’t tell you
The median ZIP area holds about 2,656 people, but the range is huge: from empty ZIPs around airports and parks to suburbs of over 130,000. Together, the 33,791 ZIP areas hold 338 million people in the latest estimates.
- Percentile ranks compare a ZIP with every ZIP area that has at least 100 residents.
- Density is people per square mile of land, leaving out lakes and bays.
- Margins of error grow as ZIPs shrink. For a ZIP of a few hundred people, treat median age and income as rough.
A ZIP’s numbers cover its whole area, which can straddle counties: check county by ZIP code. To total up the people in an area, draw it on the radius map.
Questions people actually ask
What is the population of my ZIP code?
Search your ZIP above. The card shows its population, median age, median household income, housing units and people per square mile, each with how it ranks against every other ZIP area in the US. The map shades neighboring ZIPs so you can compare at a glance.
Where do the population numbers come from?
From the US Census Bureau’s American Community Survey (ACS) 2020–2024 5-year estimates, reported for ZIP Code Tabulation Areas. They are survey estimates averaged over five years, not a head count, so small ZIPs carry wide margins of error.
Which ZIP code has the most people?
In ACS 2020–2024 data, 77494 in Katy, Texas, is the most populous ZIP area at about 140,000 people, just ahead of 08701 in Lakewood, New Jersey, and 77449, also in Katy. The leaderboard above has the full top 10.
What is the densest ZIP code in the US?
10028 on Manhattan’s Upper East Side, at roughly 164,000 people per square mile of land. All ten of the densest ZIP areas are in Manhattan.
Why does income say $250,000+?
The Census Bureau caps published median household income at $250,000. ZIPs above that line all show as $250,000+, so there is no single “richest” ZIP in this data.
Why does a ZIP show no population?
PO Box, single-building and organization ZIPs have no residential area, and some ZIP areas are parks, airports or industrial land with almost no residents. 598 ZIP areas report zero people.
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Updated 2026-11-10 · Where the data comes from