Surname
- Cormac Cullinan (fl. 1990s-present), South African attorney and author
- Daryll Cullinan (born 1967), South African cricketer
- Edward Cullinan (born 1931), British architect
- Joseph S. Cullinan (1860–1937), US oil industrialist
- Mary Cullinan (born 1949), US female university president
- Patrick Cullinan (born 1932), South African writer
- Shane Cullinan (born 1975), British composer
- Thomas Cullinan (diamond magnate), (1862–1936), South African diamond magnate
- Thomas A. Cullinan (1838–1904), US law enforcement officer
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