Thomas Cullinan

Thomas Cullinan may refer to:


 * Thomas A. Cullinan (1838–1904), American law enforcement officer
 * Thomas Cullinan (Australian cricketer) (died 1907), Australian cricketer
 * Thomas Cullinan (South African cricketer) (1946–2010), South African cricketer
 * Thomas Cullinan (diamond magnate) (1862–1936), South African diamond magnate
 * Thomas P. Cullinan (1919–1995), American author