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