John Ireland may refer to:

• John Ireland (theologian) (1440–1495), Scottish theologian and Rector of the Sorbonne
• John Ireland (martyr), (d. 1544), martyr
• John Ireland (biographer) (d. 1808), biographer of William Hogarth
• John Ireland (politician) (1827–1896), Governor of Texas
• John Ireland (archbishop) (1838–1918), of St Paul, Minnesota, university founder
• John Ireland (composer) (1879–1962), English composer
• John de Courcy Ireland (1911–2006), a maritime historian and political activist
• John Ireland (actor) (1914–1992)
• John Ireland (scientist) (1918–2001), Manhattan Project and World War II veteran
• John Ireland (barrister) (1950–present), Australian barrister

cs:John Ireland (rozcestník) de:John Ireland fr:John Ireland