The donation allows not just free tuition to music majors, but also additional private lessons and further financial aid.
Alpert's contribution was the largest gift to a community college in Southern California and the second largest in the state, school officials said during an announcement Thursday morning.
With the additional funds, LACC will also be able to increase the number of music majors from 175 to 250.
Alpert, a Boyle Heights native, and his wife, singer Lani Hall, are regular contributors to music and art education.
The Grammy-Award winning trumpeter is perhaps best known for his work in the group Herb Alpert and the Tijuana Brass and his for solo hit "Rise."
The free tuition at LACC will begin in the fall of 2017.
The Associated Press and City News Service contributed to this report.