In addition to McKinney, the district serves the town of New Hope and parts of Allen, Fairview, Weston, Princeton, and Lowry Crossing.

In 2009, the school district was rated "academically acceptable" by the Texas Education Agency.

[5] Circa 2014 residents of the Stonegate neighborhood in Lucas made a petition to be rezoned from McKinney ISD into Lovejoy ISD, but both districts refused the request.

[6] The district operates the 12,000-seat McKinney ISD Stadium that cost more than $70 million to build.

[12] The stadium hosted the 2018, 2019, 2021, 2022, and 2023 NCAA Division II National Championship football games as well as several UIL state football playoff games, such as Duncanville vs. Rockwall in 2019.