US Census Bureau publishes 318 open datasets for United States. Browse them live in Vizzie and turn any one into a map or chart.
US Census Bureau is the open-data portal for United States. It runs on US Census Bureau API, an open-data platform. You can browse it directly at api.census.gov. Reuse terms are set out in the portal's terms of service (Census Bureau APIs terms of service; requires an API key and requests attribution to the Census Bureau.).
Licences here are declared per dataset via US federal statistical data; public domain (17 U.S.C. §105). A machine-readable summary of the licence mix isn't available yet, but Vizzie surfaces each dataset's declared licence (or notes when none is given) as you browse — remember that an undeclared licence is not the same as public-domain or free-to-use, so check before you reuse.
Aggregate ACS/Decennial tables only — no microdata. Added 2026-09-15 to close the registry⊆matrix gap: this portal was in WIZARD_SOURCE_REGISTRY with no matrix row, so it silently ran on DEFAULT_RATE_LIMIT with no…
US Census Bureau doesn't expose a machine-readable breakdown of who publishes what, so there's no reliable publisher ranking to show here. Vizzie still surfaces each dataset's own publisher as you browse.
No download, no GIS specialist. Opens in Vizzie.