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State Economic Areas:

Detailed Composition and Boundary Files

The links below detail the counties that constitute each State Economic Area, as described in the SEA variable description. SEAs are available for all samples from 1850 to 1950, and are defined identically in all years. A full list of SEA codes, complete with FIPS codes for the counties they comprise, can also be downloaded as an Excel file.

ALABAMA-MONTANA

NEBRASKA-WYOMING

ALASKA, HAWAII, AND UNORGANIZED TERRITORIES

Electronic Boundary files are available for SEAs for 1940 and 1950.