Chum or CHUM may refer to:
- Chum salmon, a kind of salmon (Oncorhynchus keta), native to the northern Pacific and adjacent waterways
- Chum (tent), a nomadic tent, of the Yamal-Nenets reindeer herders in Western Siberia
- Bait for sharks
- Promotional material for political campaigns.
- Chum, Name for person associated with NDLS.
- CHUMS (paper), a boys publication by Cassell and Co. London
- CHUMS Scout Patrols, early Scouting groups started through the Chum paperCHUM:
- CHUM Limited, a defunct media company, former owner of Citytv, 'A' (formerly A-Channel), MuchMusic, and radio stations
- 1050 CHUM (AM), a Toronto radio station
- 104.5 CHUM-FM, a Toronto radio station
- Centre hospitalier de l’Université de Montréal, a university hospital network in Montreal