Hoc may refer to:
- Hellenic Olympic Committee, one of the oldest National Olympic Committees.
- Hoc (Beowulf), a Danish King from Beowulf.
- Hoc (programming language), a calculator and programming language.
- Hypertrophic (Obstructive) cardiomyopathy, but HCM is the more common and accepted acronym for that condition.
- House of Commons
- Hooked on Classics
Hoc is also the Latin word for this, used in English especially in the phrase ad hoc.