Carlos Fonseca (1936–1976) was a Nicaraguan politician, teacher and librarian who founded the Sandinista National Liberation Front.
Carlos Fonseca may also refer to: Carlos Fonseca (football manager) (born 1981), Spanish football manager Carlos Fonseca (footballer, born 1985), Portuguese football goalkeeper Carlos Fonseca (footballer, born 1987), Portuguese footballer for FC Tobol Carlos Fonseca (boxer) (born 1955), boxer from Brazil Carlos Esteban Fonseca, Puerto Rican television actor