ZIP Code Demographics: Population, Income and Housing by ZIP

By the ZIP Code Demographics Editorial Team · Last updated: October 2026

ZIP Code Demographics profiles the 120 largest ZIP Code Tabulation Areas (ZCTAs) in the United States, plus state indexes for the states they sit in. Every profile is built entirely from one source — the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-year estimates, retrieved from the Bureau's own published summary files in October 2026. We publish the figures the Bureau publishes, with their table numbers documented on the methodology page, and we omit any measure the Bureau does not release rather than fill gaps with modeled data.

A note on geography before the rankings: a ZCTA is the Census Bureau's statistical area approximating a ZIP Code, assembled from census blocks. It is how the federal government publishes ZIP-level demographics, and it is not an exact USPS delivery boundary. Each profile on this site labels its geography that way — "ZIP Code Tabulation Area (ZCTA) 77494, the Census Bureau's statistical area approximating ZIP code 77494" is the idea, repeated on every page — because honest labeling is the difference between a data source and a content farm.

The 25 Largest ZIP Codes in the United States

America's largest ZIP areas are suburban giants: the list is led by ZIP 77494 in Fort Bend County, Texas, at 140,157 residents, and it is dominated by fast-growing metropolitan counties in Texas, Florida, Arizona and the New York region. Every one of the 120 profiled ZIP areas holds more than 75,000 people — each is, in effect, a mid-sized city wearing a five-digit label. Click any ZIP for its full profile: population, age, households, income, education, employment, race and ethnicity, home values and rents, each compared with its state and the nation.

Browse by State

State pages summarize the statewide ACS figures — income, age, education, housing — and rank the state's largest profiled ZIP codes against each other. They are the fastest way to see internal contrast: in most states the richest profiled ZIP earns several times the median of the poorest, a spread the state average alone would never show.

All 120 Profiled ZIP Codes

Learn to Use ZIP Data Well

ZIP-level data is easy to misuse: ZIP Codes are mail routes, ACS figures are estimates with margins of error, and a five-year average is not a snapshot. Our short guides explain what a ZCTA is, how the ACS works, how to read margins of error, and how to interpret income, education and housing figures — the difference between citing Census data and merely quoting it.

Frequently Asked Questions

Data: U.S. Census Bureau, American Community Survey (ACS) 2020–2024 5-year estimates, retrieved October 2026. Source files and table numbers are listed on our methodology page; the underlying data is published at census.gov.