Thomas McKay (disambiguation)

Thomas McKay (1792–1855) was a Scottish-born Canadian businessman and co-founder of Ottawa, Ontario.

Thomas or Tom McKay may also refer to:
 * Thomas McKay (fur trader) (1796–1849), Canadian fur trader and early settler of Oregon
 * Thomas McKay (Canadian politician) (1839–1912), Canadian member of Parliament and senator
 * Thomas E. McKay (1875–1958), Utah politician and leader in The Church of Jesus Christ of Latter-day Saints
 * Thomas McKay (Northwest Territories politician) (1849–1924), Canadian Anglo-Métis politician and first mayor of Prince Albert, Saskatchewan
 * Thomas McKay (Australian politician) (1909–2004), golfer and politician in New South Wales
 * Thomas McKay (Alaska politician), American politician
 * Thomas McKay (gunner) (died 2005), known as "Tam the Gun", gunner at Edinburgh Castle's One O'Clock Gun
 * Thomas J. McKay, professor of philosophy at Syracuse University, New York
 * Tom McKay (athlete) (1900–1978), Canadian Olympic runner
 * Tom McKay (footballer) (born 1938), Australian rules footballer