Mermaid Quay is a residential waterway address within the Noosa Waters canal estate at Noosaville, on the Noosa River system.

It is identified as an access point on Maritime Safety Queensland's Beacon to Beacon Guide for the Noosa River, placing it within the network of canals and jetties that connect Noosa Waters to the broader river.

Properties along Mermaid Quay have direct waterfront access, with private jetties and lock entry providing passage to the Noosa River. The lock connects the controlled-level canal system of Noosa Waters to the tidal river beyond.