S class
S class or Class S may refer to:
- Mercedes-Benz S-Class automobile
- S class submarine, multiple types of submarines
- Holland America Line#Statendam Class (S Class), a class of the Holland America Line fleet
- S class destroyer (1916), British warships operating from the end of World War I into World War II
- S and T class destroyer, British warships of World War II
- Baltimore and Ohio Class S, and American 2-10-2 "Santa Fe" type steam locomotive
- Victorian Railways S class, steam locomotive
- Victorian Railways S class (diesel), diesel locomotive
- BNCR Class S, Irish narrow gauge steam locomotive
- GNRI Class S, Irish steam locomotive
- Stellar classification#Class S, a stellar classification for carbon stars
- Class S (genre) is a genre of fiction about girls' relationships, popular in Japan