Pull neighborhood demographic data from the Census Bureau's ACS API for a comparative market analysis.
domain: api.census.gov · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Request a free API key from the Census key-signup page.
Choose an ACS dataset and vintage, such as the 5-year estimates for a given year, appropriate for the geography size.
Query variables like median household income and population by specifying their table/variable codes.
Scope the query to a geography using for/in parameters such as tract, county subdivision, or ZIP code tabulation area.
Look up current variable codes via the dataset's variables endpoint before building a permanent integration.
Known gotchas
ZIP Code Tabulation Areas do not perfectly match USPS ZIP codes or informal neighborhood boundaries — tract-level geography is more accurate but needs a state/county lookup first.
Small queries work without a key, but production use should always use one to avoid throttling.
Variable codes can change between dataset vintages, so don't hardcode them without periodic verification.
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