John Dennison 'Dinny' Campbell (22 July 1889 – 30 August 1966) was a national representative for Australia in rugby union before switching codes and playing rugby league for the Eastern Suburbs club during the 1910-12 and 1921 seasons.
At the end of the 1912 season he moved to England, where he enjoyed 9 very successful seasons - scoring 136 tries. In 1921 Campbell returned to Australia, where he linked with his former club, Eastern Suburbs, for one final season. Campbell later went on to become a talent scout for the Eastern suburbs. Campbell made his début for Leeds against Keighley at HeadingleyRugby Stadium, Leeds on Saturday 14 September 1912. Campbell played left-centre, i.e. number 4, in Leeds' 2-35 defeat by Huddersfield in the Championship Final during the 1914–15 season.