S class
S class may refer to:

Automobiles
Mercedes-Benz S-Class, an automobile
S-segment, a European vehicle size class

Locomotives
Victorian Railways S class, Australian steam locomotives
Victorian Railways S class (diesel), Australian diesel locomotive
South Australian Railways S class, steam  locomotives
WAGR S class, Australian steam locomotives

Ships
S-class destroyer (disambiguation), multiple types of ships
S-class submarine (disambiguation), multiple types of submarines
S-class ferry, operated by BC Ferries in British Columbia, Canada
S-class torpedo boat, ex-Russian torpedo boats operated by Finland
Statendam-class cruise ship, a class of the Holland America Line

Other uses
"S-Class", a 2023 song by Stray Kids from 5-Star

See also
Class S (disambiguation)
S-Type (disambiguation)
Type S (disambiguation)