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State of birth, United States

Codes and Frequencies

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BPLUS indicates the person's state of birth within the United States.

Comparability — General

BPLUS is largely comparable across the U.S. samples. The codes of BPLUS are based on the Federal Information Processing Standards (FIPS) coding scheme. For the country of birth of foreign-born persons, see BPLCOUNTRY.

For all sample years, persons born in United States territories are coded as "Foreign-Born".


  • All persons


  • United States: 1850a, 1850b, 1860, 1870, 1880a, 1880b, 1900, 1910, 1960, 1970, 1980, 1990, 2000, 2005, 2010, 2015