Tay Sound is a significant marine inlet located in Nunavut, Canada, near the community of Mittimatalik (Pond Inlet) on northern Baffin Island. It is a complex coastal sound with deep connections to the surrounding Arctic ecosystem and local Inuit knowledge. The sound features a sinuous coastline with prominent headlands like Oorbignaluk Headland and connects to other major inlets such as Navy Board Inlet, Milne Inlet, Oliver Sound, and Tremblay Sound. Its waters are part of the Arctic marine environment, characterized by profound seasonal changes in sea ice conditions that fundamentally dictate travel and access. The area falls within the Sirmilik National Park boundaries, with specific parcels described along its eastern coast and adjacent to Bylot Island, placing it within a protected national park context that influences management and access.