Geographic areas

The estimates of personal income are prepared for the following geographic areas: Counties and county equivalents, metropolitan statistical areas, micropolitan statistical areas, combined statistical areas, metropolitan divisions, states, and regions. County equivalents consist of the District of Columbia, the boroughs and census areas of Alaska, the parishes of Louisiana, and the independent cities of Maryland, Missouri, Nevada, and Virginia. The estimates for Kalawao County, Hawaii and the small independent cities of Virginia-- generally those with fewer than 100,000 residents-- are combined with those for adjacent counties.

The metropolitan statistical areas, micropolitan statistical areas, combined statistical areas, and metropolitan divisions are aggregations of the counties. These metropolitan area definitions are those issued for Federal statistical purposes by the Office of Management and Budget.

Estimates are prepared for all states and for the District of Columbia. In addition, the state estimates are aggregated to prepare the estimates for the following eight regions: Far West, Great Lakes, Mideast, New England, Plains, Rocky Mountain, Southeast, and Southwest. The regional classifications, which were developed in the mid-1950s, are based on the homogeneity of the states in terms of economic characteristics, such as the industrial composition of the labor force, and in terms of demographic, social, and cultural characteristics. In addition, estimates can be prepared for any area that can be defined either in terms of counties and county equivalents or in terms of states.