 | ||
This is a list of the 100 largest counties in the United States by population based on the national decennial US census conducted on 1 April 2010 and subsequent mid-2010 and mid-2014 official estimates released by the United States Census Bureau (USCB).
Many of the counties on the list include major cities or metropolitan areas. Five of the listed counties have consolidated city and county government, namely the City and County of Honolulu, Metropolitan Government of Nashville and Davidson County, Tennessee, City and County of Philadelphia, City and County of San Francisco and City and County of Denver. Queens County, Kings County, New York County, Bronx County, and Richmond County, New York are coterminous with boroughs of New York City, fall under the jurisdiction of the combined city government, and therefore lack a county seat (with the exception of Queens, whose county seat is Jamaica). Each of the four most populous counties is listed instead with the location of its county courthouse. Connecticut, Rhode Island, and most of Massachusetts also don't have county governments.