Clearwater is a city locate in Pinellas County, Florida, USA, nearly due west of Tampa and northwest of St. Petersburg. As of the 2000 census, the city had a total population of 108,787; however, according to the 2005 U.S. Census Bureau's estimates, the city's population fell slightly to 108,687. It is the county seat of Pinellas County. Clearwater is the smallest of the three principal cities in the Tampa-St. Petersburg-Clearwater metropolitan area, most commonly referred to as the Tampa Bay Area. The four-county area is home to roughly 2.7 million residents, making it the second largest metropolitan statistical area (MSA) in the state, and the third largest in the Southeastern United States.