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American Community Survey 5-Year Estimates
Social, economic, housing, and demographic estimates for U.S. geographies down to the block group.
About the data
The Census Bureau runs the ACS as an ongoing survey and pools five years of responses into each release, which is what makes estimates possible for geographies as small as a block group. That pooling is also the limitation: a 2020-2024 figure is a period average rather than a reading of 2024, and every estimate arrives with a margin of error that widens as the geography gets smaller. Comparisons only hold across non-overlapping periods, so 2020-2024 is set against 2015-2019, and individual variables are sometimes redefined between releases.
What's included
Four table types cover the full ACS subject range. Detailed Tables carry the most granular estimates on every topic and go all the way down to the block group; Subject Tables and Data Profiles reach the census tract and present percentages alongside estimates; Comparison Profiles stop at places and county subdivisions and test the current five-year period against the preceding non-overlapping one. A row is one geography for one five-year period, from the nation through states, counties, metropolitan areas, ZIP Code Tabulation Areas, tracts and block groups, joinable on Census geographic identifiers.
Why we offer this
Most researchers reaching for ACS are not studying the ACS. They are controlling for local income, education, age structure or housing tenure while studying something else: hospital use, retail location, school outcomes, labour supply. What makes the survey usable for that is consistent national coverage at one geography with one set of definitions, released every year, so a control built for one county behaves the same way in the next.
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