In addition to Alvarado, the district also serves the unincorporated community of Lillian.

The Lillian Independent School District consolidated into Alvarado ISD on July 1, 1986.

[1] In 2011, the school district was rated "academically acceptable" by the Texas Education Agency.

[1] Alvarado High School participates in the boys sports of baseball, basketball, football, soccer, track, cross country, and wrestling.

[5] The school participates in the girls sports of basketball, soccer, softball, track, cross country, and volleyball.