A Typology of Micropolitan Areas in the United States

In 2003, the U.S. Census Bureau created a new census designation known as micropolitan statistical areas to better differentiate between metropolitan and nonmetropolitan areas. This article uses hierarchical clustering and discriminate analysis to create a typology of micropolitan areas using U.S. census data on demographic, housing, and economic characteristics. The regional concentration ratio (RCR) is then used to determine whether a cluster type is over- or underrepresented at the census division. The analysis revealed a three-cluster solution with: (1) a middle- class cluster overrepresented in the East North Central and West North Central divisions; (2) a poor, minority cluster overrepresented in the South Atlantic, East South Central, West South Central, and Mountain divisions; and (3) a high human capital cluster overrepresented in the New England, Mountain, and Pacific divisions. Of micropolitan areas, 59.8 percent were considered middle-class; 28.1 percent were poor, minority; and 12.1 percent were high human capital. The nine-cluster solution further refined cluster categories.