| Collin County Texas Cities/Towns - Allen, Anna, Blue Ridge, Celina, Dallas, Fairview, Farmersville, Frisco, Josephine, Lavon, Lowry Crossing, Lucas, McKinney (County Seat), Melissa, Murphy, Nevada, New Hope, Parker, Plano, Princeton, Prosper, Richardson, Royse City, Sachse, St. Paul, Westminster, Weston, Wylie |
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 Your Ad Here Collin County is a suburban county located in the U.S. state of Texas. Its county seat is McKinney. History The county and its seat are both named in honor of Collin McKinney, one of the five men who drafted the Texas Declaration of Independence and the oldest of the 59 men who signed it. |