This report examines population change and the demographic components of change from 2000 to 2007 for central and outlying counties of metropolitan statistical areas. Population change in metro areas and their component central and outlying counties will be examined through the configurations of census regions and divisions, metro area population size categories, and 12 of the most populous metro areas. Demographic components of change are births, deaths, and migration. The difference between the birth and death components is termed natural increase, and the migration component can consist of both net international migration and net domestic migration. Data used in this report come from the U.S. Census Bureau’s Population Estimates Program.