John Craik Lyall Sydney Wall (25 October 1891 - 9 June 1969) was an Australian cricketer and rugby league footballer who represented New South Wales in both sports.
Lyall played fullback and centre throughout his league career, and was also a prolific goal kicker.
By 1920, he left the Balmain district and turned out for the Western Suburbs Magpies for one season.
As established players, Lyall Wall, George Carstairs, Herb Gilbert and Reg Fusedale all brought much needed experience to the St. George Dragons club in its foundation year.
Wall represented the New South Wales rugby league team on four occasions during 1919.