ZIP Code Guides
Learn how to read and use Census data for every US ZIP code. These guides cover what the American Community Survey reveals about demographics, income, education, housing, and commute patterns for 33,099 ZIP Code Tabulation Areas, and how to avoid common pitfalls when interpreting neighborhood-level Census statistics.
Download the state-level summary (CSV) , open extract wired into this page's Dataset JSON-LD.
Coverage is not income
Texas leads ZIP coverage at 1,935 ZCTAs (#1 of 52). That is not the income board: New Jersey's unweighted average ZIP household income is $121,992 (#1 of 52) on 595 ZCTAs.
- 7
- guides on this hub
- Texas
- ZIP-count #1 (1,935)
- New Jersey
- income #1 ($121,992)
- 33,099
- ZCTAs in the corpus
ZIP-count rank uses every reporting state and territory. Income rank is the unweighted mean of each ZIP's ACS median household income.
What do these guides cover?
Understanding ZIP Code Data
What Census data tells you about a ZIP code, demographics, income, education, housing, and what it doesn't.
Using ZIP Code Data for Relocation
How to evaluate a neighborhood before moving using income, education, housing, and commute data from the Census.
How to Read Census Demographics
What population, age, ethnicity, income, and education numbers mean for understanding a community, and common mistakes to avoid.
What Your ZIP Code Says About You
How income, education, age, and housing patterns vary dramatically by ZIP code, and what the starkest contrasts in Census data reveal about opportunity.
Best ZIP Codes for Families
How to find family-friendly ZIP codes using Census data on school quality indicators, safety proxies, homeownership, and affordability.
Understanding Income Inequality by ZIP Code
How to interpret median household income, poverty rates, and income distribution across ZIP codes, and the common mistakes people make.
Commute Patterns by ZIP Code
How Census commute data reveals daily quality of life, mean travel times, work-from-home rates, and transportation modes by neighborhood.
Methodology
The guides interpret Census American Community Survey (ACS) 5-Year Estimate fields with worked examples from real U.S. ZIP codes. Every number cited in a guide comes from the same ACS pipeline that powers ZIP, city, county, and state detail pages across PlainZIP, guides do not pull independent data sources or publish proprietary estimates.
Numeric examples use the most recent release of the ACS 5-Year Estimates. When a guide illustrates a concept (for example, how to read a poverty rate or how commute time varies by density), the ZIP-level figures shown can be re-derived from the corresponding ZIP detail page. Composite grades referenced in guides (such as scorecard inputs) are documented with their weighted formulas on the matching dashboard or scorecard page.
For the full data-sources list, data-update process, and data dictionary, see the full methodology page.
Primary data sources: U.S. Census Bureau, ACS 5-Year Estimates (2023); HUD USPS Crosswalk; FHFA House Price Index. Read the full methodology →