A sica is an Illyrian, Thracian, Dacian, and Roman sword or dagger.

Sica may also refer to:

Mario Sica (born 1936), Italian diplomat Jessica Jung (nicknamed "Sica") (born 1989), Korean-American singer Sica Ho (born 2000), Hong Kong singer

SICA may refer to:

Central American Integration System (Spanish: Sistema de la Integración Centroamericana) Solomon Islands Christian Association South Indian Cultural Association, Hyderabad South Indian Cultural Association, Indore South Inter-Conference Association Subud International Cultural Association

See also Sicarius (disambiguation)