Simple feature collection of NYC 2010 census block groups, clipped to the shoreline. EPSG:2263, NAD83 / New York Long Island (ftUS).
Format
nyc_census_block_groups_2010_sf
A simple feature collection with 6377 rows and 6 columns:
- geoid
Unique identifier for 2010 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
- ct2010
2010 census tract number (6-digit)
- bg2010
2010 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 2010-2014 through 2015-2019 use 2010
census geography, so geoid joins directly to the GEOID column
returned by tidycensus::get_acs(geography = "block group", ...) for
those years.
Derived from nyc_census_blocks_2010_sf (NYC Planning Department 2010
census blocks, Release 25C, August 2025). That dataset has no GEOID
column, so each block's GEOID prefix is built from the borough's county
FIPS code, ct2010, and the first digit of cb2010, and blocks are
dissolved on it. One block (bctcb2010 "10223003005") is coded in the
source to tract 022300, which does not exist in 2010 geography; it lies
wholly within tract 022301 and is assigned there. Microscopic interior
rings left by the union have been removed.
Every block group matches a block group in the 2015-2019 5-year ACS. The ACS block groups with no polygon here are all "Block Group 0" water-only areas.