Thomas, Tom or Tommy Nelson may refer to:
American public officials
- Thomas Nelson, Jr. (1738–1789), American Revolutionary War leader; signer of Declaration of Independence; governor of Virginia (1781)
- Thomas Nelson Community College, American two-year college in southeastern Virginia
- Thomas Nelson High School, a high school in Bardstown, Kentucky
- Thomas M. Nelson (1782–1853), American congressman from Virginia
- Thomas Amos Rogers Nelson (1812–1873), American congressman from Tennessee
- Thomas Nelson (Oregon judge) (1819–1907), Chief Justice of Oregon Supreme Court, 1850–1853
- Thomas G. Nelson (1936–2011), federal judge to the United States Court of Appeals for the Ninth Circuit
- Thomas H. Nelson (1820–1896), American diplomat during and after the Civil War
- Thomas Leverett Nelson (1827–1897), American judge
- Tom Nelson (politician) (born 1976), American politician from Wisconsin
- Tommy Nelson (mayor) (born 1970), mayor of New Roads in Pointe Coupee Parish, South Louisiana
Others
- Thomas "Scotch Tom" Nelson (1677–1747), Scottish immigrant and merchant to America in the Colony of Virginia
- Thomas Nelson, 2nd Earl Nelson (1786–1835), English nobleman who was a nephew of Admiral Horatio Nelson
- Thomas D. Nelson, Sr. (1895–2007), African-American shopkeeper (from Texas) who lived six months past his 111th birthday
- Tommy Nelson (baseball) (1917–1973), American baseball infielder
- Thomas Nelson (UK politician) (1888–1954), Northern Irish politician, for Enniskillen
- Tom Nelson (American football) (born 1986), American football player of the Philadelphia Eagles
- Tom Nelson (American football coach), former American football coach in the United States
- Tom Nelson (Australian footballer) (1883–1957), Australian rules footballer for Collingwood
- Thomas Arthur Nelson (died 1917), Scottish rugby player