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is a city in North Carolina, United States. It is the county seat of Gaston County. The population was 66,277 according to the 2000 census (35% of the population of Gaston County). It is part of the Charlotte metropolitan area, officially designated the Charlotte-Gastonia-Concord Metropolitan Statistical Area (MSA). As the second-largest city (in population) in the MSA after Charlotte, Gastonia has experienced steady growth, with a population change during the 1990s (according the US Census Bureau) of more than +10%.
Gastonia is located at (35.255220, -81.180249). at the geographic center of Gaston County.
According to the United States Census Bureau, the city has a total area of 46.3 square miles (119.8 km²), of which, 46.1 square miles (119.3 km²) of it is land and 0.2 square miles (0.5 km²) of it (0.43%) is water. It occupies 13% of the total area of Gaston County.