Denny Island is an island on the Central Coast of British Columbia, in the Central Coast Regional District, Canada. It lies just east of the community of Bella Bella, aka Waglisla, which is on Campbell Island. It is the location of Old Bella Bella, now mainly abandoned, but home to Canadian Coast Guard and Fisheries & Oceans bases, and Shearwater, home to Shearwater Marine. The island has a population of 138 Its main attraction is the McEmery Aquatic Centre on Reservoir Lane.
Denny Island Aerodrome is a registered aerodrome and lies east of Bella Bella. The runway is not maintained during the winter and, being unlit, is usable only during the day.