McKinney is a city in and the county seat of Collin County, Texas, United States, and the second in population to Plano. According to the U.S. Census Bureau, the city’s 2010 population was 131,117 making it the nineteenth most populous city in the state of Texas. It is part of the Dallas-Fort Worth metroplex, and is located about 31 mi (50 km) north of Dallas.
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