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State Economic Areas:

Detailed Composition and Boundary Files

The links below detail the counties comprising 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 can also be downloaded as Excel or tab-delimitted text.

ALABAMA-MONTANA

NEBRASKA-WYOMING

ALASKA, HAWAII, AND UNORGANIZED TERRITORIES

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