John Ireland may refer to:

• John Ireland (theologian) (a.k.a. Irland, c. died 1495), Scottish theologian and diplomat
• John Ireland (pirate) (active circa 1694), American pirate who sailed with Thomas Tew
• John Ireland (priest) (1761–1842), Anglican philanthropist and Dean of Westminster
• John Ireland (politician) (1827–1896), American politician
• John Ireland (bishop) (1838–1918), American Catholic leader
• John Ireland (composer) (1879–1962), English composer
• John Ireland (philatelist) (1882–1965), British philatelist
• John Frederick Ireland (cricketer) (1888-1970), Trinity College cricket player
• John de Courcy Ireland (1911–2006), Irish historian and activist
• John Ireland (actor) (1914–1992), Canadian-born actor and director
• John Ireland (musician) (born 1954), South African pop artist
• John Ireland (sportscaster) (active from 1995), American sportscaster