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2010 Census Name Lookup Tables Description

Overview

The Census Bureau's Redistricting Data Products provide the states and other data users with the small area census data necessary for legislative redistricting.  Among the geographic products disseminated for the 2010 Census are the Block Assignment Files (BAFs) and corresponding Name Look-up Tables (NLTs).

NLTs have been created for each of the 50 states, the District of Columbia, and Puerto Rico and work in conjunction with the BAFs.  Every NLT contains the names and codes of every geographic area of the specific type within the state.  If no records of the geographic area type exist within the state, the NLT will only display the field header.

File Naming Convention

The file naming convention is as follows:

     NAMES_ST<ss>_<USPSabbrev>_<entity>.txt

where <ss> is the 2-character state FIPS code, <USPSabbrev> is the 2-letter U.S. Postal Service (USPS) state abbreviation, and <entity> is the geography area type being represented.

File Format

NLTs are pipe (|) delimited text (.txt) files.  The first line of each NLT is the field header.  The 10 types of NLTs and the fields they contain are described below:

Geographic Area <entity> Field Layout
Congressional districts CD STATEFP,DISTRICT,NAME,NAMELSAD
State legislative districts - upper SLDU STATEFP,DISTRICT,NAME,NAMELSAD
State legislative districts - lower SLDL STATEFP,DISTRICT,NAME,NAMELSAD
Voting districts VTD STATEFP,COUNTYFP,DISTRICT,NAME,NAMELSAD
Elementary school districts SDELM STATEFP,DISTRICT,NAME,NAMELSAD
Secondary school districts SDSEC STATEFP,DISTRICT,NAME,NAMELSAD
Unified school districts SDUNI STATEFP,DISTRICT,NAME,NAMELSAD
Incorporated places INCPLACE STATEFP,PLACEFP,NAME,NAMELSAD
Census designated places CDP STATEFP,PLACEFP,NAME,NAMELSAD
American Indian / Alaska Native / Native Hawaiian areas AIANNH STATEFP,AIANNHCE,NAME,NAMELSAD

Field Definitions

Field definitions are as follows:


  • STATEFP:  2-character state FIPS code
  • DISTRICT:  variable length code representing the district (i.e., geographic area)
    • CD - 2-character code
    • SLDU - 3-character code
    • SLDL - 3-character code
    • VTD - variable length code of up to 6 characters
    • SDELM - 5-character code
    • SDSEC - 5-character code
    • SDUNI - 5-character code
  • PLACEFP:  5-character place FIPS code
  • AIANNHCE:  4-character American Indian / Alaska Native / Native Hawaiian (AIANNH) area census code
  • COUNTYFP:  3-character county FIPS code
  • NAME:  variable length geographic area name (e.g., Atlanta)
  • NAMELSAD:  concatenated variable length geographic area name and legal/statistical area description (LSAD) (e.g., Atlanta city)

Source: U.S. Census Bureau | Geography | (301) 763-1128 |  Last Revised: December 06, 2012