County Composition of Older Metropolitan Areas, 1850-2011
The tables linked to below list the counties associated with older metro areas identified by METAREA in each sample from 1850 through 2011. These tables list only the metro areas that are identified by METAREA in 1900. For tables listing county composition for all metro areas back to 1900, see County Composition of All Metropolitan Areas.
In cases where a part of an older metro area later split off into its own area, the newer "sub-areas" are also listed in the tables below, even if they did not exist separately in 1900. This makes it possible to track composition changes for all counties that had been part of an older metro area for the full period covered by these tables.
For 2000 samples and for all ACS and PRCS samples through 2011, METAREA uses the 1999 metropolitan area delineations from the Office of Management and Budget (OMB), as were used for Census 2000 reporting. Beginning with the 2012 ACS and PRCS samples, IPUMS provides a separate variable, MET2013, that identifies metro areas using the 2013 OMB delineations and codes. For a listing of counties associated with the 2013 areas, see the Census Bureau's 2013 "List 1" Delineation File.
Users are advised to check the area-specific notes at the end of each table.