Collin County, Texas is part of the Dallas/Ft. Worth Metroplex and has nearly 1 million in population. McKinney is the county seat. The most populated cities are Plano, McKinney and Frisco. Collin County is new North American home of Toyota. Other notable HQs and hubs are JC Penney, Dr. Pepper, Capital One, State Farm & Liberty Mutual. The Dallas Cowboys recently made Frisco there new home.