The two-story red brick schoolhouse, which was part of the Harris County School System, consisted of two classrooms downstairs and an auditorium upstairs.

By 1935, the original schoolhouse was torn down and replaced with a new buff brick building that contained grades one through eleven.

Therefore, the district built a new red brick high school with a gymnasium and a swimming pool, which was located in the 700 block of Main Street.

By 1974, students began attending classes at the new Tomball High School on Sandy Lane, later renamed Quinn Road.

In 2000, voters approved a $98.4 million bond referendum that enabled the district to renovate Tomball High School.

In 2013, the Tomball High School baseball team finished the season with a 36-4 record and won the Texas UIL 4A State Championship.

[7] In 2024, the Tomball High School baseball team finished the season with a 41-3 record and won the Texas UIL 6A State Championship.

Tomball's senior catcher, Cade Arrimbade, was named Texas Gatorade Player of the Year.

27.4% of students were Economically Disadvantaged, 3.9% were English Language Learners, and 8.8% received Special Education services.