The Annapolis Basin is a sub-basin of the Bay of Fundy, located on the southwestern shores of the bay, along the northwestern shore of Nova Scotia and at the western end of the Annapolis Valley.

The basin takes its name from the Annapolis River , which drains into its eastern end at the town of Annpolis Royal. The basin measures approximately 24 km northeast-southwest and 6 km at its widest from northwest to southeast.

It is a sheltered and mostly shallow waterbody, framed by the North and South mountain ranges of the Annapolis Valley; the basin is geologically a continuation of the valley floor. A break in the North Mountain range at the northwestern edge of the basin, called the "Digby Gut", provides an outlet to the Bay of Fundy.

The Bay Ferries Limited ferry service operating across the Bay of Fundy between Digby and Saint John maintains a terminal on the western shore of the basin near the Digby Gut.

Rivers

Rivers which drain into the basin include:

• Annapolis River
• Bear River
• Moose River

Islands

Only two major islands are located on the basin:

• Bear Island
• Goat Island

Communities

The basin hosts several historic seaports, including:

• towns of Annapolis Royal and Digby
• village of Bear River
• communities of Granville Ferry , Port Royal, Port Wade , Victoria Beach , Clementsport , Deep Brook , and Smiths Cove

A former Royal Canadian Navy base and decommissioned Canadian Forces Base is located between Deep Brook and Clementsport on the southeast shore of the basin - see CFB Cornwallis .