Puget Sound, an inlet of the Pacific Ocean in northwestern Washington. It begins at the junction of the straits of Juan de Fuca and Georgia. The sound stretches southward from this junction for about 100 miles (160 km). It is divided into many branches by the Kitsap Peninsula and by numerous islands. Seattle, Tacoma, and Everett are busy ports on the sound. Bremerton is the site of a major naval shipyard. Olympia, the state capital, is at the sound's southern tip.