The American Community Survey 5-year estimates are the backbone of modern demographic research. Here's what the data covers, how it's collected, and why it matters for every community in America.
The American Community Survey, or ACS, is the United States Census Bureau's ongoing household survey that collects detailed demographic, social, economic, and housing information from approximately 3.5 million addresses every year. Unlike the decennial census — which counts every person in America once per decade — the ACS runs continuously and produces annual estimates that capture how America is changing in near real time.
The Census Bureau releases ACS data in two primary forms. The 1-year estimates cover a single calendar year and are only available for places with populations of 65,000 or more — about 830 geographies nationally. The 5-year estimates pool five years of data, which dramatically increases the sample size and makes reliable estimates possible for small geographies including census tracts, ZIP code tabulation areas (ZCTAs), and school districts. CensusDepth primarily uses 5-year data so that every community — no matter how small — appears in the dataset.
ACS data is organized into four profile tables, each covering a major topic area:
CensusDepth stores ACS 5-year estimates for three vintages: 2019, 2021, and 2023. The 2019–2021 comparison is particularly revealing because it captures the COVID-19 disruption — the explosion of remote work, income shifts from stimulus payments, the collapse of in-person commuting, and changes in household formation. The 2021–2023 window shows the post-pandemic normalization (or lack thereof) in housing costs, migration, and labor markets.
Every geography profile on CensusDepth — from state profiles down to individual ZIP codes — draws its core data from the ACS. On each page you'll see figures labeled with their vintage year. For cities and counties large enough to have 1-year data, we show both estimates and note the difference.
Margins of error (MOE) matter, especially for small geographies. For census tracts and many ZIP codes, a figure like "median household income: $52,400 ± $8,700" is common. We display these wherever the MOE exceeds 10% of the estimate.
The decennial census (last conducted in 2020) counts every resident and provides 100% data on population, housing units, race, ethnicity, and household relationships. It's the most accurate count we have, but it only happens every ten years. The ACS, by contrast, is a sample survey — statistically representative but not a 100% count. For current-year demographic profiles, the ACS is the right tool. For redistricting, apportionment, and block-level analysis, the decennial census is essential.
Ready to dive in? Start with the state-level profiles for a national overview, then drill down into counties, cities, and metro areas. Use the income rankings, education rankings, and poverty rankings to quickly compare geographies on the metrics that matter most to you.
Using a composite of median home values, median rents, and household income, we identified the ten US cities with the best affordability profiles in the latest Census data.
From median home values doubling in a decade to record rent-cost-burden rates, the Census Bureau's ACS data paints a vivid picture of housing stress across America.
Maryland leads the nation in median household income while Mississippi remains at the bottom. Here's what the 2023 ACS data shows about the income geography of America.