This website contains historical information on the RUCAs - an update is in progress
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General Methods

The Census tract-based RUCA Version 2 codes are based on: a) 2000 Census work commuting information, and b) Census Bureau defined Urbanized Areas (cities of 50,000 and greater population) and Urban Clusters (cities/towns of from 2,500 through 49,999 populations). The definitions of Urbanized Areas and Urban Clusters were developed with great care and are quite complex.

The simplified methods for the creation of Version 2 are as follows:

More information on the creation of the Census tract Version 2 of the RUCAs and on how to download Census tract RUCAs is available on the Economic Research Service web site: