Jack Lyons

Jack Lyons may refer to:


 * Jack Lyons (cricketer) (1863–1927), Australian cricketer
 * Jack Lyons (diver), Canadian diver
 * Jack Lyons (financier) (1916–2008), British entrepreneur and philanthropist
 * Jack Lyons (footballer, born 1912) (1912–1988), Australian rules footballer for Geelong
 * Jack Lyons (footballer, born 1919) (1919–1955), Australian rules footballer for Essendon and North Melbourne
 * Jack Lyons (soccer) (born 1901), American soccer player
 * Jack Lyons (unionist) (died 1961), American labor union leader
 * J. B. Lyons (Jack Binignus Lyons, 1922–2007), Irish medical historian and writer