Several ships of the Argentine Navy have been named ARA San Luis (or San Luis before the 1860s):
, a felucca that served in the second Argentine squadron during the Independence War , a originally ordered by Argentina that was purchased by Greece (as Aetos) in 1912 before delivery , a , in service with Argentina 1938 to 1971 , a Type 209 submarine in service with Argentina from 1974 to 1997