For the 2018–2019 school year, the district received a score of 89 out of 100 from the Texas Education Agency.

In 1911, taxpayers approved a $25,000 bond for the construction of the district's first brick building, the JOH Bennette school.

[7] In 1925, the Texas State Legislature expanded the size of the district from 25 to 333 square miles.

It also serves unincorporated communities, including almost all of The Woodlands (extreme south and west parts of The Woodlands are located in Tomball ISD and Magnolia ISD, respectively),[8] parts of Deerwood,[9] the settlement of Tamina, the community of River Plantation,[citation needed] and a portion of the Porter Heights CDP.

[11] The Caney Creek High School attendance zone serves a large section of Montgomery County east of Conroe, including the city of Cut and Shoot, the unincorporated community of Grangerland, and a portion of Porter Heights.

[11] The Grand Oaks High School attendance zone serves an area of unincorporated Montgomery County near Spring.