John Trevor may refer to:

• John Trevor (died 1357), Bishop of St Asaph
• John Trevor (died 1410), Bishop of St Asaph
• John Trevor (Unitarian minister) (1855–1930), Unitarian minister who formed The Labour Church

• Sir John Trevor (1563–1630), MP and Surveyor of the Queen's Ships
• Sir John Trevor (1596–1673), his son, MP from 1620, member of the Council of State during the Protectorate
• Sir John Trevor (1626–1672), his son, Secretary of State for the Northern Department during the 17th century
• Sir John Trevor (speaker) (1637–1717), Speaker of the House of Commons and Master of the Rolls in the late 17th and 18th centuries
• John Morley Trevor (the elder) (1681–1719), grandson of the Secretary of State for the Northern Department, MP for Lewes and Sussex
• John Morley Trevor (the younger) (1717–1743), son of the above, MP for Lewes
• John Trevor, 3rd Viscount Hampden (1748–1824), 18th century British diplomatist
• John B. Trevor (Pennsylvania politician), Pennsylvania State Treasurer

• John Bond Trevor (1822-1890), American financer and Wall Street pioneer
• John B. Trevor Sr. (1878–1956), American lawyer and immigration reformer
• John B. Trevor Jr. (1909–2006), electrical engineer and author

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