Thomas Abernethy may refer to Thomas Abernethy (explorer) (1803–1860), Scottish seafarer, gunner in the Royal Navy, and polar explorer Thomas Perkins Abernethy (1890–1975), American historian of early American history Thomas Abernethy (politician) (1903–1998), American politician Tom Abernethy (born 1954), American professional basketball player
See also Abernethy (surname)