Dennis O'Neill is a World Cup winning former professional rugby league footballer who played in the 1960s and 1970s. He played at representative level for Great Britain and Lancashire, and at club level for Widnes and Oldham, as a .
Dennis O'Neill played , and scored a try in Widnes 8âÂÂ15 defeat by Wigan in the 1971âÂÂ72 Lancashire Cup Final during the 1970âÂÂ71 season at Knowsley Road, St. Helens on Saturday 28 August 1971, and played right- in the 6-2 victory over Salford in the 1974âÂÂ75 Lancashire Cup Final during the 1974âÂÂ75 season at Central Park, Wigan on Saturday 2 November 1974.
Dennis O'Neill played in Widnes' 7âÂÂ15 defeat by Bramley in the 1973 BBC2 Floodlit Trophy Final during the 1973âÂÂ74 season at Naughton Park, Widnes on Tuesday 18 December 1973.
Dennis O'Neill played right- in Widnes' 2âÂÂ3 defeat by Bradford Northern in the 1974âÂÂ75 Player's No.6 Trophy Final during the 1974âÂÂ75 season at Wilderspool Stadium, Warrington on Saturday 25 January 1975.
Dennis O'Neill appeared as a substitute (replacing Alan Prescott) in Widnes' 5âÂÂ20 defeat by St, Helens in the 1975âÂÂ76 Challenge Cup, London Final during the 1975âÂÂ76 season at Wembley Stadium, London on Saturday 8 May 1976, in front of a crowd of 89,982, and played in the 7-16 defeat by Leeds in the 1976âÂÂ77 Challenge Cup Final during the 1976âÂÂ77 season at Wembley Stadium, London on Saturday 7 May 1977, in front of a crowd of 80,871.
In October 1978, he was signed by Whitehaven.
Dennis O'Neill won caps for Great Britain while at Widnes in 1971 against New Zealand, and in the 1972 Rugby League World Cup against Australia (1-try), and France.
Dennis O'Neill is the brother of the rugby league footballer James "Jim"/"Jimmy" O'Neill.