Holy Trinity Diocesan High School is a private, Catholic, coeducational high school founded in 1966 by the Roman Catholic Diocese of Rockville Centre.  Located on Long Island, HTHS draws students from Nassau, Suffolk and Queens Counties. Accredited by Cognia, North Central Association, Board of Regents of the University of the State of New York. HTHS is a recipient of the National Exemplary School Award. The current enrollment is 600.  Admission to HTHS is selective, based on a competitive examination and 7th and 8th grade achievement.  The faculty numbers 41, 98% holding a Master’s or higher degree.