Frontenac Secondary School is a high school in the west end of Kingston, Ontario, Canada. The Limestone District School Board operates it. The team plays under the nickname "Frontenac Falcons".

Frontenac Secondary School was founded in 1957 as Collins Bay High School and adopted its current name in 1964. In 2006, construction began on a major extension, which includes a new library, a media room, an elevator, and several additional computer labs and classrooms.

Every year, Frontenac has junior and senior teams that compete in the Canadian game show Reach for the Top. In 1998–99, the senior team was the national champion. The team had qualified for the American game show Whiz Quiz. In 2007 and 2008, the senior REACH team was the international Whiz Quiz champions, and in 2006 and 2007, they attended the provincial REACH Championships.

• Rob Bagg, CFL player
• Wayne Cashman, Canadian retired professional ice hockey player, former NHL head coach, currently an assistant coach of the Boston Bruins.
• Taylor Hall, Boston Bruins hockey player and number 1 draft pick in the 2010 NHL Entry Draft
• Dee Sterling, CFL player
• John Tripp, professional ice hockey player, playing in German League.
• Dylan Wykes, long-distance runner, qualified for the marathon in the 2012 Summer Olympics in London.
• Rick Smith, Canadian retired professional hockey player for the Boston Bruins
• Amanda Leveille, professional hockey player, two-time Isobel Cup champion, and NWHL all-time record holder in wins
• Aaliyah Edwards, professional basketball player

• Education in Ontario
• List of secondary schools in Ontario

• Official website
• School's athletics website