Convert a US street address into latitude/longitude plus its Census geographies (state, county, 2020 census tract GEOID). Free, no API key. Source: U.S. Census Bureau Geocoder.

Return the 2020 census tract (with county and state) that contains a latitude/longitude point. Free, no API key. Source: U.S. Census Bureau Geocoder.

Determine whether a location is in a designated Qualified Opportunity Zone (Round 1, Tax Cuts and Jobs Act of 2017). Accepts an address, a lat/lng, or an 11-digit 2010 census tract GEOID. OZ designations are keyed to 2010 tracts, so address/coordinate inputs are resolved to their 2010 tract automatically. Free, no API key.

Return demographic indicators for an 11-digit census tract GEOID from the American Community Survey 5-Year (2023). Requires a free Census API key in the CENSUS_API_KEY environment variable (get one instantly at https://api.census.gov/data/key_signup.html). Available fields: population, median_household_income, median_home_value, median_gross_rent, median_age, households, poverty_rate. Omit 'fields' to get a sensible default set.

Return the FEMA flood-hazard zone for a latitude/longitude point, including whether it falls in a Special Flood Hazard Area (SFHA, where flood insurance is typically required). Free, no API key. Source: FEMA National Flood Hazard Layer.