National Survey of Family Growth Geocodes

The following table lists the geographic variables in NSFG. When applying for access to this data through the RDC, please specify the variable name in your data dictionary.

Geographic variable	Cycle 1* 1973	Cycle 2 1976	Cycle 3 1982	Cycle 4 1988	Cycle 5** 1995	Cycle 6 2002	2006-2010	2011-2013 2013-2015 2015-2017 2017-2019***
At interview
State (FIPS code)	na	stfips76	stfips82	stfips88	stfips95	stfips02	nsfg06_10	FIPS_State
State (name or abbreviation)	na	stab76	stab82	stab88	stab95		stab06
County (FIPS code)	na	cofips76	cofips82	cofips88	cofips95	cofips02	cofips06	FIPS_County
County (name)	na						coname06
Census tract	na	tract76	tract82	tract88	tract95	tract02	tract06
Block group	na	blkgrp76		blkgrp88	blkgrp95	blkgrp02	blkgrp06
Block	na		blk82				blk06
State and county FIPS code	na						stcofips06
Unique block group ID (state + county + tract + block group)	na					uniqgeo02	uniqgeo06
At previous census
State (FIPS code)					stfips95_c90	stfips02_c00	stfips06_c00	FIPS_State2010
State (name or abbreviation)					stab95_c90		stab06_c00
County (FIPS code)					cofips95_c90	cofips02_c00	cofips06_c00
County (name)							coname06_c00
Census tract					tract95_90	tract02_c00	tract06_c00
Block group					blkgrp95_c90	blkgrp02_c00	blkgrp06_c00
Block							blk06_c00
State and county FIPS code							stcofips06_c00
Unique block group ID (state + county + tract + block group)						uniqgeo02_c00	uniqgeo06_c00

IMPORTANT NOTES:

* Geographic data for Cycle 1 are missing and unavailable.

** Cycle 5 also has geographic data based on where respondents were living at the time of the 1993 National Health Interview Survey. The available geographic variables for 1993 are the same as what is available in Cycle 5 for residence at the time of the previous Census.

*** Tract and block group are available when using the 2011-2015 and/or 2015-2019 paradata files. For more information on those paradata files see this webpage https://www.cdc.gov/nchs/nsfg/nsfg_special_supplementary_data.htm