Attachment 100: Census Bureau State and County Codes

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

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


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


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: States of the United States (including the District of Columbia) with their assigned codes

Name Abbrev. Code Name Abbrev. Code
Alabama AL 01 Montana MT 30
Alaska AK 02 Nebraska NE 31
Arizona AZ 04 Nevada NV 32
Arkansas AR 05 New Hampshire NH 33
California CA 06 New Jersey NJ 34
Colorado CO 08 New Mexico NM 35
Connecticut CT 09 New York NY 36
Delaware DE 10 North Carolina NC 37
District of Columbia DC 11 North Dakota ND 38
Florida FL 12 Ohio OH 39
Georgia GA 13 Oklahoma OK 40
Hawaii HI 15 Oregon OR 41
Idaho ID 16 Pennsylvania PA 42
Illinois IL 17 Rhode Island RI 44
Indiana IN 18 South Carolina SC 45
Iowa IA 19 South Dakota SD 46
Kansas KS 20 Tennessee TN 47
Kentucky KY 21 Texas TX 48
Louisiana LA 22 Utah UT 49
Maine ME 23 Vermont VT 50
Maryland MD 24 Virginia VA 51
Massachusetts MA 25 Washington WA 53
Michigan MI 26 West Virginia WV 54
Minnesota MN 27 Wisconsin WI 55
Mississippi MS 28 Wyoming WY 56
Missouri MO 29      


Table 2: Outlying areas of the United States with their assigned codes

Name Abbrev. Code Name Abbrev. Code
American Samoa AS 60 U.S Minor Outlying Islands OM 74
Guam GU 66 Baker Island   81
Northern Mariana Islands MP 69 Howland Island   84
Palau PW 70 Jarvis Island   86
Puerto Rico PR 72 Johnston Atoll   67
Virgin Islands VI 78 Kingman Reef   89
      Midway Islands   71
      Navassa Island   76
      Palmyra Atoll   95
      Wake Island   79