Chauncey O'Toole (born 22 February 1986 in Saint John, New Brunswick) is a Canadian former rugby union player.

Chauncey O'Toole has previously played for the Belleisle Rovers, Castaway Wanderers RFC, RGC 1404 in North Wales, and the Rock of the Canadian Rugby Championship.

In September 2010, O'Toole signed a short-term contract with the Glasgow Warriors as cover at a time when the club was plagued with injury.

[3] The Ospreys loaned O'Toole to feeder club Bridgend Ravens on 5 November 2011 for their game against Newport RFC.

O'Toole scored a try on his debut, in the dying seconds of the game to snatch the win for his adopted side by 2 points.