Established about 32 miles north of Dallas in Collin County, McKinney is not only one of the fastest growing cities in Texas; it is the fastest in the entire U.S.A. This desirability stems from its small-town charm, easy access to larger metros and an abundance of parks and natural attractions. Discover culture at the McKinney Performing Arts Center. Students attend McKinney Independent School District. Find new homes in McKinney.