Attachment 100: Census Bureau State and County Codes

This attachment provides coding information for the state and county variables included on the NLSY97 geocode CD. These variables use the current Federal Information Processing Standards (FIPS) codes. For Rounds 1-7, these variables used the 1990 Census codes. Beginning in Round 8, the 2000 codes were used. There are very few changes between the two systems. This attachment presents the 2000 codes, and it also notes changes from the 1990 system where appropriate.

Note: Incarcerated respondents will have a -3 (invalid skip) on this variable while they are incarcerated as well as the interviews immediately before and after the incarceration spell.

County codes

• Codes for Alabama-Iowa (PDF)
• Codes for Kansas-New York (PDF)
• Codes for North Carolina-Wyoming (PDF)

Errata

There are several changes to the county codes in the PDF files, as follows:

Added

• Denali Borough, AK, code 068
• Skagway-Hoonah-Angoon Census Area, AK, code 232
• Broomfield County, CO, code 014

Deleted

• Skagway-Yakutat-Angoon Census Area, AK, code 231
• Clifton Forge (independent) city, VA, code 560 (added to Alleghany County, code 005)

State codes

• Table 1: State Codes for the 50 States and Washington, D.C.
• Table 2: Codes for outlying areas and territories of the U.S. (Although no respondents have lived in an outlying area to date, this table is provided in anticipation that the codes will be needed at some point in the future).