Duncanville, the City of Champions! Located south of Dallas, Duncanville is part of the “Best Southwest” cities that also include Cedar Hill, Desoto and Lancaster, all part of Dallas County. Convenient access to I20 and highway 67 provides easy transport to Dallas and Tarrant County. Downtown Duncanville has become a small town hub of activity with DuncanSwitch, a monthly street market, and plenty of small business to visit. Stop in to Roma’s for a New York style Pizza. Fill your prescriptions and shop for your quilting supplies at Ben Franklin Apothecary, but don’t forget to get your Blue Bell ice cream cone at Kitchens Deli while you’re there!