Sydney "Syd" Oglesby Walmsley (17 July 1896[3] – first ¼ 1973) was an English professional rugby league footballer who played in the 1910s and 1920s.

[5] Syd Walmsley played fullback, and scored a try in Leeds’ 11-3 victory over Dewsbury in the 1921–22 Yorkshire Cup Final during the 1921–22 season at Thrum Hall, Halifax on Saturday 26 November 1921, and played fullback, and scored two-goals in Huddersfield’s 10-3 victory over Wakefield Trinity in the 1926–27 Yorkshire Cup Final replay during the 1926–27 season at Headingley, Leeds on Wednesday 1 December 1926, the initial match at Headingley, Leeds on Saturday 27 November 1926 had been postponed due to fog.

Syd Walmsley played fullback, and scored a try in Millom's 5-44 defeat by Leeds in the 1919-20 Challenge Cup first-round match during the 1919-20 season at Millom on Saturday 21 February 1920, impressing the Leeds management, he was transferred from Millom, and he made his début for Leeds in the 11-0 victory over Wakefield Trinity on Saturday 20 March 1920, he became a regular goal kicker at Leeds, and was Leeds' leading goal-scorer with 28-goals during the 1920-21 season, he was selected for the trial matches for the 1924 Great Britain Lions tour, but was ultimately not selected for Great Britain, with Ernie Knapman and Jim Sullivan, selected at fullback for the tour of Australia, and New Zealand, though Charlie Pollard played fullback in Great Britain's 11-13 defeat by New Zealand in the 2nd test match at Basin Reserve, Wellington on Wednesday 6 August 1924.

[4] Syd Walmsley ran a camp in the Yorkshire Dales for children as part of the evacuations of civilians in Britain during World War II.

[4] Syd Walmsley's marriage to Gladys Agnes (née Rosterne) was registered in Barrow-in-Furness district, Lancashire during third ¼ 1923.