William Linn may refer to:
William Linn (clergyman) (1752–1808), President of Queen's College (now Rutgers University) and Chaplain of the United States House of Representatives William Linn (soldier) (died 1836?), believed to have fought and died in the Battle of the Alamo William Alexander Linn (1846–1917), American journalist and historian
See also William Lynn (disambiguation)