Holy Trinity Diocesan High School

Holy Trinity High School is a co-educational learning environment located centrally in Hicksville, Nassau County, New York on Long Island. Education is based on New York State Education Standards with a strong emphasis on Religious Studies. It is operated by the Roman Catholic Diocese of Rockville Centre.

Performing Arts program
The Performing Arts program offers the arts as part of the curriculum towards either Regents or Honors diplomas. Students study dance and theater (or band) in place of gym and visual arts, with one year of theater arts substituted for choir. In the early 2000s, Holy Trinity put on the first high school production of Les Misérables in the world.

The athletic camps run for kids in grades 3 or 4 through high school.

Notable alumni

 * Kevin Conry - head coach men's lacrosse University of Michigan
 * Shana Cox – track and field sprinter
 * Matt Doherty – men's college basketball coach
 * Ralph Perretta – professional NFL player
 * Ryan Colucci - film producer/director
 * Jean Shafiroff – philanthropist and socialite
 * Jenna Ushkowitz – cast member of Glee
 * Maurice Richardson - NBA Employee & Video Editor
 * Tim Dillon - Comedian