Port Madison, sometimes called Port Madison Bay, is a deep water bay located on the west shore of
Puget Sound in western
Washington. It is bounded on the north by
Indianola, on the west by
Suquamish, and on the south by
Bainbridge Island. Port Madison connects to
Port Orchard via the
Agate Pass to the southwest. Two small bays open off Port Madison: Miller Bay to the northwest, and another small bay to the south which, confusingly, is also called Port Madison Bay (or, locally, as the "Inner Harbor").