St. Mark's High School

Saint Mark's High School is a coeducational Roman Catholic high school located at 2501 Pike Creek Road, in unincorporated New Castle County, Delaware, with a Wilmington postal address. The school is administrated by the Roman Catholic Diocese of Wilmington. It is accredited by the Middle States Association of Colleges and Schools.

Notable alumni

 * Nicole Bosso, former Miss Delaware USA
 * John Carney, Governor of Delaware (2017–present), former U.S. Representative from Delaware (2011-2017) and former Lieutenant Governor of Delaware (2001–2009)
 * Louis Carlet, union organizer
 * Tom Douglas, Seattle chef and restaurateur
 * Kevin Mench, retired Major League Baseball player.
 * Mario Pino, horse racing jockey
 * David Plouffe, campaign manager for Barack Obama
 * Keith Powell, television actor
 * Pedro Swann, former MLB player
 * Steve Watson, NFL wide receiver