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
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