Weslaco High School was founded in 1921 alongside the Weslaco Independent School District, and was the first high school serving Weslaco, Texas until the construction of Weslaco East High School in fall 2000. As of today, the high school's present location has not changed since 1973. For the 2009–2010 school year, Weslaco High School is currently a TEA "Recognized" School.

Martin Patterson Hingle was an American character actor who appeared in stage productions and in hundreds of television shows and feature films. His first film was On the Waterfront in 1954. He often played tough authority figures. Hingle was a close friend of Clint Eastwood and appeared in the Eastwood films Hang 'Em High, The Gauntlet, and Sudden Impact. He also portrayed Jim Gordon in the Batman film franchise from 1989 to 1997.