Government Documents Resources: County and Municipal Government Information

Data.gov has the open data catalogs of 10 cities, 3 counties, and 8 states

Population, housing, business, and other data for all U.S. counties, cities with 25,000 or more inhabitants, and places of 2,500 or more inhabitants.

Topics: age, agriculture, ancestry, banking, building permits, business patterns, crime, earnings, education, elections, employment, government, health, households, housing, income, labor force, manufactures, population, poverty, retail trade, social programs, veterans, vital statistics, water use, and wholesale trade.

Information about the creation of and alterations to the size, shape, and location of counties in the United States plus the District of Columbia.