Simple feature collection of NYC 2020 census block groups, clipped to the shoreline. EPSG:2263, NAD83 / New York Long Island (ftUS).
Format
nyc_census_block_groups_2020_sf
A simple feature collection with 6670 rows and 6 columns:
- geoid
Unique identifier for 2020 census block groups (12-digit FIPS code: state + county + tract + block group)
- boro_code
Borough code as character (1=Manhattan, 2=Bronx, 3=Brooklyn, 4=Queens, 5=Staten Island)
- boro_name
Borough name
- ct2020
2020 census tract number (6-digit)
- bg2020
2020 block group number within the tract (1-digit)
- geometry
Multipolygon
Details
Block groups are statistical divisions of census tracts and the smallest
geography for which the American Community Survey (ACS) publishes
estimates. ACS 5-year releases from 2020 onward use 2020 census
geography, so geoid joins directly to the GEOID column returned by
tidycensus::get_acs(geography = "block group", ...).
Derived from nyc_census_blocks_2020_sf (NYC Planning Department 2020 census blocks, Release 25C, August 2025) by dissolving blocks on the first 12 digits of their GEOIDs. Because the source blocks are clipped to the shoreline, the block groups do not extend into the water. Microscopic interior rings left by the union (all smaller than 0.01 square feet) have been removed.
Every block group matches a block group in the 2020-2024 5-year ACS. The ACS block groups with no polygon here are water-only areas with no land in the source blocks and an estimated population of zero; nearly all are "Block Group 0".