Had or HAD may refer to:
- had, past tense of the English verb have
- as an auxiliary verb
- as a transitive main verb of possession
- in passive voice constructions
- Hadit, a Thelemic deity
- Hole accumulation diode, in electronics
See also
- Have (disambiguation)
- Hade (disambiguation)
- James while John had had had had had had had had had had had a better effect on the teacher, a well-formed but ambiguous sentence