Knox Rugby Club

The Knox Rugby Club, formerly known as Knox Old Boys RUFC, is a rugby union football club which plays in Division Three of the New South Wales Suburban Rugby Union and is based in Sydney, Australia. The club has won the Kentwell Cup, among other trophies.

History
The club was founded by and is associated with the ex-students association of Knox Grammar School, a Uniting Church day and boarding school for boys, located in Wahroonga, an upper North Shore suburb of Sydney. The club won the New South Wales Suburban Rugby Union's Kentwell Cup in 2005 and 2009.

Notable players

 * Ross Turnbull – Australia (1968)
 * Nathan Charles - Australia (2014)
 * Richard Woolf - NSW (2017)
 * Michael Ainsworth – Brazil (2024)
 * Harry Loebenstein [2000-2010] - never left his wing

Two Knox players became Chairman of the Australian Rugby Union; Ross Turnbull and David Clark.

4th Grade Premierships: 2
* Denotes joint premiership with Waverley.