Subclass may refer to:
- Subclass (biology), a taxonomic rank intermediate between class and superorder
- Subclass (computer science), a class that is derived from another class or classes
- Subclass (set theory), a class contained in some other class in the same way that a subset is a set contained in some other set.
- SubClass, a Minneapolis-based electronic music collective consisting of DJs, producers, promoters, etc.