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2020 Comparability Relationship File Record Layouts

2010 Census Tabulation Block to 2020 Census Tabulation Block Relationship File Layout

These are zipped, pipe-delimited text files with UTF-8 encoding provided at the state level (TAB2010_TAB2020_ST<##>.zip) for the fifty states, District of Columbia, and Puerto Rico.

Field # Maximum Length Field Name Field Description
1 2 STATE_2010 2010 tabulation state FIPS code
2 3 COUNTY_2010 2010 tabulation county FIPS code
3 6 TRACT_2010 2010 census tract number
4 4 BLK_2010 2010 tabulation block number
5 1 BLKSF_2010 2010 tabulation block suffix
6 14 AREALAND_2010 2010 Land area in square meters
7 14 AREAWATER_2010 2010 Water area in square meters
8 1 BLOCK_PART_FLAG_O 2010 tabulation block part flag; Blank = whole; P = part
9 2 STATE_2020 2020 tabulation state FIPS code
10 3 COUNTY_2020 2020 tabulation county FIPS code
11 6 TRACT_2020 2020 census tract number
12 4 BLK_2020 2020 tabulation block number
13 1 BLKSF_2020 2020 tabulation block suffix
14 14 AREALAND_2020 2020 Land area in square meters
15 14 AREAWATER_2020 2020 Water area in square meters
16 1 BLOCK_PART_FLAG_R 2020 tabulation block part flag; Blank = whole; P = part
17 14 AREALAND_INT Intersection Land area shared by the 2010 and 2020 blocks represented by the record in square meters
18 14 AREAWATER_INT Intersection Water area shared by the 2010 and 2020 blocks represented by the record in square meters

2020 Block Group to 2010 Block Group Relationship File Layout

These are pipe-delimited text files with UTF-8 encoding provided at the national (tab20_blkgrp20_blkgrp10_natl.txt) and state level (tab20_blkgrp20_blkgrp10_st<##>.txt) for the fifty states, District of Columbia, Puerto Rico, and the island areas.

Relationship File Column Name Maximum Length Column Definition
OID_BLKGRP_20 22 OID of 2020 blkgrp
GEOID_BLKGRP_20 12 GEOID of the 2020 blkgrp 
NAMELSAD_BLKGRP_20 100 Name with translated Legal/Statistical Area Description of 2020 blkgrp
AREALAND_BLKGRP_20 14 Total Land area of 2020 blkgrp in square meters
AREAWATER_BLKGRP_20 14 Total Water area of 2020 blkgrp in square meters
MTFCC_BLKGRP_20 5 MAFTIGER feature class code of 2020 blkgrp
FUNCSTAT_BLKGRP_20 1 Functional status of 2020 blkgrp
OID_BLKGRP_10 22 OID of 2010 blkgrp
GEOID_BLKGRP_10 12 GEOID of the 2010 blkgrp 
NAMELSAD_BLKGRP_10 100 Name with translated Legal/Statistical Area Description of 2010 blkgrp
AREALAND_BLKGRP_10 14 Land area of 2010 blkgrp in square meters
AREAWATER_BLKGRP_10 14 Water area of 2010 blkgrp in square meters
MTFCC_BLKGRP_10 5 MAFTIGER feature class code of 2010 blkgrp
FUNCSTAT_BLKGRP_10 1 Functional status of 2010 blkgrp
AREALAND_PART 14 Calculated Land area of the overlapping part in square meters
AREAWATER_PART 14 Calculated Water area of the overlapping part in square meters

2020 Census Tract to 2010 Census Tract Relationship File Layout

These are pipe-delimited text files with UTF-8 encoding provided at the national (tab20_tract20_tract10_natl.txt) and state level (tab20_tract20_tract10_st<##>.txt) for the fifty states, District of Columbia, Puerto Rico, and the island areas.

Relationship File Column Name Maximum Length Column Definition
OID_TRACT_20 22 OID of 2020 tract
GEOID_TRACT_20 11 GEOID of the 2020 tract 
NAMELSAD_TRACT_20 100 Name with translated Legal/Statistical Area Description of 2020 tract
AREALAND_TRACT_20 14 Total Land area of 2020 tract in square meters
AREAWATER_TRACT_20 14 Total Water area of 2020 tract in square meters
MTFCC_TRACT_20 5 MAFTIGER feature class code of 2020 tract
FUNCSTAT_TRACT_20 1 Functional status of 2020 tract
OID_TRACT_10 22 OID of 2010 tract
GEOID_TRACT_10 11 GEOID of the 2010 tract 
NAMELSAD_TRACT_10 100 Name with translated Legal/Statistical Area Description of 2010 tract
AREALAND_TRACT_10 14 Land area of 2010 tract in square meters
AREAWATER_TRACT_10 14 Water area of 2010 tract in square meters
MTFCC_TRACT_10 5 MAFTIGER feature class code of 2010 tract
FUNCSTAT_TRACT_10 1 Functional status of 2010 tract
AREALAND_PART 14 Calculated Land area of the overlapping part in square meters
AREAWATER_PART 14 Calculated Water area of the overlapping part in square meters

2020 County Subdivision to 2010 County Subdivision Relationship File Layout

These are pipe-delimited text files with UTF-8 encoding provided at the national (tab20_cousub20_coubsub10_natl.txt) and state level (tab20_cousub20_cousub10_st<##>.txt) for the fifty states, District of Columbia, Puerto Rico, and the island areas.

Relationship File Column Name Maximum Length Column Definition
OID_COUSUB_20 22 OID of 2020 cousub
GEOID_COUSUB_20 10 GEOID of the 2020 cousub 
NAMELSAD_COUSUB_20 100 Name with translated Legal/Statistical Area Description of 2020 cousub
AREALAND_COUSUB_20 14 Total Land area of 2020 cousub in square meters
AREAWATER_COUSUB_20 14 Total Water area of 2020 cousub in square meters
MTFCC_COUSUB_20 5 MAFTIGER feature class code of 2020 cousub
CLASSFP_COUSUB_20 2 FIPS class code of 2020 cousub
FUNCSTAT_COUSUB_20 1 Functional status of 2020 cousub
OID_COUSUB_10 22 OID of 2010 cousub
GEOID_COUSUB_10 10 GEOID of the 2010 cousub 
NAMELSAD_COUSUB_10 100 Name with translated Legal/Statistical Area Description of 2010 cousub
AREALAND_COUSUB_10 14 Land area of 2010 cousub in square meters
AREAWATER_COUSUB_10 14 Water area of 2010 cousub in square meters
MTFCC_COUSUB_10 5 MAFTIGER feature class code of 2010 cousub
CLASSFP_COUSUB_10 2 FIPS class code of 2010 cousub
FUNCSTAT_COUSUB_10 1 Functional status of 2010 cousub
AREALAND_PART 14 Calculated Land area of the overlapping part in square meters
AREAWATER_PART 14 Calculated Water area of the overlapping part in square meters

2020 Place to 2010 Place Relationship File Layout (incorporated place or census designated place [CDP])

These are pipe-delimited text files with UTF-8 encoding provided at the national (tab20_place20_place10_natl.txt) and state level (tab20_place20_place10_st<##>.txt) for the fifty states, District of Columbia, Puerto Rico, and the island areas.

Relationship File Column Name Maximum Length Column Definition
OID_PLACE_20 22 OID of 2020 place
GEOID_PLACE_20 10 GEOID of the 2020 place 
NAMELSAD_PLACE_20 100 Name with translated Legal/Statistical Area Description of 2020 place
AREALAND_PLACE_20 14 Total Land area of 2020 place in square meters
AREAWATER_PLACE_20 14 Total Water area of 2020 place in square meters
MTFCC_PLACE_20 5 MAFTIGER feature class code of 2020 place
CLASSFP_PLACE_20 2 FIPS class code of 2020 place
FUNCSTAT_PLACE_20 1 Functional status of 2020 place
OID_PLACE_10 22 OID of 2010 place
GEOID_PLACE_10 10 GEOID of the 2010 place 
NAMELSAD_PLACE_10 100 Name with translated Legal/Statistical Area Description of 2010 place
AREALAND_PLACE_10 14 Land area of 2010 place in square meters
AREAWATER_PLACE_10 14 Water area of 2010 place in square meters
MTFCC_PLACE_10 5 MAFTIGER feature class code of 2010 place
CLASSFP_PLACE_10 2 FIPS class code of 2010 place
FUNCSTAT_PLACE_10 1 Functional status of 2010 place
AREALAND_PART 14 Calculated Land area of the overlapping part in square meters
AREAWATER_PART 14 Calculated Water area of the overlapping part in square meters

2010 ZCTA5 to 2020 ZCTA5 Relationship File Layout

This is a pipe-delimited text file with UTF-8 encoding provided at the national level (tab20_zcta510_zcta520_natl.txt).

Relationship File Column Name Maximum Length Column Definition
OID_zcta5_10 22 OID of 2010 zcta5
GEOID_zcta5_10 5 GEOID of the 2010 zcta5
NAMELSAD_zcta5_10 100 Name with translated Legal/Statistical Area Description of 2010 zcta5
AREALAND_zcta5_10 14 Total Land area of 2010 zcta5 in square meters
AREAWATER_zcta5_10 14 Total Water area of 2010 zcta5 in square meters
MTFCC_zcta5_10 5 MAFTIGER feature class code of 2010 zcta5
CLASSFP_zcta5_10 2 FIPS class code of 2010 zcta5
FUNCSTAT_zcta5_10 1 Functional status of 2010 zcta5
OID_zcta5_20 22 OID of 2020 zcta5
GEOID_zcta5_20 5 GEOID of the 2020 zcta5
NAMELSAD_zcta5_20 100 Name with translated Legal/Statistical Area Description of 2020 zcta5
AREALAND_zcta5_20 14 Land area of 2020 zcta5 in square meters
AREAWATER_zcta5_20 14 Water area of 2020 zcta5 in square meters
MTFCC_zcta5_20 5 MAFTIGER feature class code of 2020 zcta5
CLASSFP_zcta5_20 2 FIPS class code of 2020 zcta5
FUNCSTAT_zcta5_20 1 Functional status of 2020 zcta5
AREALAND_PART 14 Calculated Land area of the overlapping part in square meters
AREAWATER_PART 14 Calculated Water area of the overlapping part in square meters

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