Data Cart

Your data extract

0 variables
0 samples
View Cart
COUNTYFIPS
County (FIPS code)

Description

COUNTYFIPS is created by adjusting the Inter-University Consortium for Political and Social Research (ICPSR) coding scheme. See COUNTY for detailed information.

COUNTYFIPS usually takes the first 3 digits of the ICPSR code. For cases that do not follow this pattern, see the User Note in the COUNTY variable description.

Note that COUNTYFIPS is a state-dependent variable; it must be read with one of the STATE variables (STATEICP, STATEFIP) to distinguish among counties located in different states.

Many county boundaries and some county names changed over time. The IPUMS does not impose a uniform county boundary system on the data, so a particular county listed for a given year in the IPUMS should be assumed to have the boundaries that it had in that year.

Counties are unavailable in public-use microdata from 1950 onwards. However, it is possible to recover some counties from low-level geographic identifiers. These include State Economic Areas (SEA) in 1950; county groups in 1970 (CNTYGP97) and 1980 (CNTYGP98); and Public Use Microdata Areas (PUMA) from 1990 onwards, including Super-PUMAs (PUMASUPR) in 2000 (COUNTY cannot be constructed for 1960 1 percent because geographic information below the state level is not currently available). Counties were identifiable if:

  • they were coterminous with a single identifiable SEA, county group, or PUMA; or
  • they contained multiple identifiable SEAs, county groups, or PUMAs, none of which extended into other counties.

An Excel spreadsheet provides a list of counties and their corresponding ICPSR and FIPS codes available in each year from 1950 onwards.

Codes

0000 = County not identifiable from public-use data (1950-onward)*

*Counties are unavailable in public-use microdata from 1950 onwards. However, it is possible to recover some counties from low-level geographic identifiers. See Counties identifiable in 1950-onward data for details. The spreadsheet contains both ICPSR and FIPS county codes.

Comparability

This variable is comparable across years, but county boundaries change over time.

Universe

  • : Households in publicly identifiable areas; not available for Puerto Rico.

Availability

United States
  • 2016: All samples
  • 2015: All samples
  • 2014: All samples
  • 2013: All samples
  • 2012: All samples
  • 2011: All samples
  • 2010: All samples
  • 2009: All samples
  • 2008: All samples
  • 2007: All samples
  • 2006: All samples
  • 2005: All samples
  • 2004: --
  • 2003: --
  • 2002: --
  • 2001: --
  • 2000: 5%; 1% old; 1% unwt; 1%
  • 1990: 5%; 1%; 1% unwt
  • 1980: 5% state; 1% metro
  • 1970: 1% metro fm1; 1% metro fm2
  • 1960: 5%
  • 1950: All samples
  • 1940: --
  • 1930: --
  • 1920: --
  • 1910: --
  • 1900: --
  • 1880: --
  • 1870: --
  • 1860: --
  • 1850: --
Puerto Rico
  • 2016: --
  • 2015: --
  • 2014: --
  • 2013: --
  • 2012: --
  • 2011: --
  • 2010: --
  • 2009: --
  • 2008: --
  • 2007: --
  • 2006: --
  • 2005: --
  • 2000: --
  • 1990: --
  • 1980: --
  • 1970: --
  • 1930: --
  • 1920: --
  • 1910: --

Flags

This variable has no flags.

Editing Procedure

There is no editing procedure available for this variable.