Census Block Groups (2020, Massachusetts)
Boundaries of Massachusetts's census block groups as drawn for the 2020 census. A block group is the smallest area the Census Bureau publishes socioeconomic data for — roughly 600 to 3,000 people, about 1,400 in Massachusetts, typically a few residential streets — and it is the geography the census population and American Community Survey figures are mapped on.
- Published by
- US Census Bureau
- Source
- Census
- Original data
- tigerweb.geo.census.gov
- Terms of use
- Not copyrighted; cite the U.S. Census Bureau as the source
- On the map
- Areas
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What each record holds, as the publisher describes it: 11 fields.
| Field | Description |
|---|---|
geoid | Block-group identifier: state+county+tract+block group |
state_fips | State FIPS — always 25 (Massachusetts) |
county_fips | County FIPS code |
county_name | County name, e.g. Middlesex |
tract_geoid | Census tract identifier (first 11 chars of geoid) |
bg_number | Block group number within the tract |
namelsad | Census name, e.g. Block Group 2 |
aland_m2 | Land area, square metres |
awater_m2 | Water area, square metres |
intptlat | Internal point latitude (inside the polygon) |
intptlon | Internal point longitude |