Middletown High School is a public high school located in Middletown, Delaware. It is one of two high schools in the Appoquinimink School District. There were 1,164 students enrolled for the 2011-12 school year.Middletown High School serves students in grades 9-12 throughout the Appoquinimink School District. Originally opened in 1997, the facility added a two-story wing in the summer of 2002, and an expansion of its cafeteria/lobby to create extra capacity.Notable alumni Marquis Dendy, USA long jumper and triple jumper Chris Godwin, Tampa Bay Buccaneers football player Dwayne Henry, former MLB player (Texas Rangers, Atlanta Braves, Houston Astros, Cincinnati Reds, Seattle Mariners, Detroit Tigers) Chad Kuhl, MLB player Pittsburgh Pirates