Thomas Mackenzie (disambiguation)

Sir Thomas Mackenzie (1853–1930) was Prime Minister of New Zealand in 1912, and later High Commissioner.

Thomas Mackenzie may also refer to:
 * Thomas MacKenzie (Russian admiral) (1740–1786), rear admiral, founder of Sevastopol
 * Thomas Mackenzie (Royal Navy officer) (1753–1813), Royal Navy admiral
 * Thomas Mackenzie (Scottish politician) (1793–1856), MP for Ross and Cromarty, 1837–1847
 * Thomas Mackenzie, Lord Mackenzie (1807–1869), Scottish judge
 * Thomas Mackenzie (Australian politician) (1854–1934), member of the New South Wales Legislative Assembly
 * Thomas Mackenzie (illustrator) (1887–1944), illustrator
 * Tom MacKenzie (1882–1927), Australian rules footballer
 * Thomas Mackenzie (1789–1822), Member of parliament for Ross-shire, 1818–1822