The district serves most of Hidalgo and the city of Granjeno as well as small portions of McAllen, Pharr (including sections of Las Milpas), and San Juan.
[2] In 2009, the school district was rated "academically acceptable" by the Texas Education Agency.
Schools were also established in the nearby communities of Junco, Capote, and Granjeno during the late 19th century.
As enrollment increased, however, a new Hidalgo High School was constructed and opened its doors in 1976, serving grades 7-12.
Growth slowed in the 1990s, due in part to the completion of a new high school in neighboring Valley View ISD.