The County and City Data Book is a valuable tool for any academic and public library and contains essential data for any economic development official, regional planner, and urban researcher.  It is the most comprehensive source of information about the individual counties and cities in the United States.  This edition includes: More than 175 data items for all states and the nation's 3,141 counties. Approximately 80 data items for 1,265 incorporated places with populations of 25,000 or more. Nearly 80 additional items from the American Community Survey for 242 incorporated places with populations of 100,000 or more. 2006 population estimates for all states and counties. A complete list of metropolitan areas and their component counties with 2006 population estimates. A complete set of state maps showing all counties and incorporated places with populations of 25,000 or more.