The Cassi were a tribe of Iron Age Britain.

Cassi may also refer to:

People with the given name Cassi Chandler (born 1958), American special agent and spokesperson Cassi Davis (born 1964), American actress and singer Cassi Thomson (born 1993), Australian-American actress and singer Cassi Van Den Dungen (born 1992), Australian model

People with the surname Enrico Cassi (1863–1913), Italian sculptor Giuseppe Cassì (born 1963), Italian politician Llorenç Cassi (1940–2020), Spanish Catalan athlete Lorenzo Alier Cassi (1878–1942), Spanish Catalan lawyer and politician Mario Cassi (born 1973), Italian baritone

Other uses Cassi Hill, a residential area in Saint Thomas, United States Virgin Islands Chemical Abstracts Service Source Index, from the American Chemical Society

See also Casey (disambiguation) Cassandra (disambiguation) Cassie (disambiguation) Cassis (disambiguation) Kassandra (disambiguation) Kassi (disambiguation) Kassie (disambiguation)