Raúl Alfonsín (1927–2009), was the former President of Argentina.
Alfonsín may also refer to: Ricardo Alfonsín (born 1953), politician and son of the former President of Argentina Alfonsín (footballer) (born 1951), Spanish footballer and football manager
See also Alfonsina (disambiguation) Alfonsine, Italian comune Alfonsino, species of fish Alfonsine tables, astronomical table