John or Jack Lyons may refer to:
Business and industry John Lyons (American plantation owner) (c. 1822–1864), American steamship captain and plantation owner in Louisiana Jack Lyons (unionist) (1891–1961), American labor union leader Jack Lyons (financier) (1916–2008), British businessman and philanthropist John H. Lyons Jr. (1919–1986), American labor union leader, son of the older unionist John Lyons (British trade unionist) (1926–2016), British trade union leader
Military John Lyons (Antiguan landowner) (1760–1816), British Royal Navy officer and landowner and politician in Antigua John Lyons (Royal Navy officer, born 1787) (1787–1872), British admiral, son of the above John Lyons (VC) (c. 1824–1867), Irish soldier in the British Army and recipient of the Victoria Cross
Politics John R. Lyons (1860–1929), American politician, member of the Arizona State Senate John J. Lyons (c. 1881–1945), American politician, secretary of state of New York John Lyons (Australian politician) (1885–1948), member of the South Australian House of Assembly John Lyons (Longford politician), Irish member of the Dáil Éireann for Longford–Westmeath, 1922–1927 John W. Lyons, American politician, mayor of Cambridge, Massachusetts, 1938–1941 John Lyons (Northern Territory politician), Australian politician, member of the Northern Territory Legislative Council, 1963–1968 John Lyons (British politician) (born 1949), British member of parliament John Lyons (Dublin politician) (born 1977), Irish member of the Dáil Éireann for Dublin North-West
Sports Jack Lyons (cricketer) (1863–1927), Australian cricketer Jack Lyons (diver) (1873–1956), Canadian diver John Lyons (ice hockey) (1900–1971), American ice-hockey player Jack Lyons (soccer) (1901–1987), American soccer player John Lyons (end) (1911–1981), American football player 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 John Lyons (hurler) (1923–2005), Irish hurler John Lyons (horse trainer) (born 1947), American horse trainer John Lyons (American football coach) (born 1952), American football coach John Lyons (footballer, born 1956) (1956–1982), Welsh footballer
Others John Charles Lyons (1792–1874), Anglo-Irish landowner, politician, antiquary, and horticulturalist John Lyons (bishop) (1878–1958), Canadian Anglican bishop J. B. Lyons (John Binignus Lyons, 1922–2007), Irish medical historian Sir John Lyons (linguist) (1932–2020), British linguist John Lyons (poet) (born 1933), Trinidad-born British poet and visual artist John Lyons (actor) (born 1943), British actor John Lyons (journalist) (born 1961), Australian journalist
See also John Lyon (disambiguation) John Lions (1937–1998), Australian computer scientist