The Census Tract is the last 6 digits of the 11-digit census tract code as defined by the US Census Bureau. To derive the full 11-digit census tract code, combine the 5-digit FIPS Code (state code + county code) and the 6-digit Census Tract
See also:
fips_code
- Data Dictionarycensus_block_group
- Data Dictionary- Census Tract - Wikipedia