Winchester Bay, formerly Umpqua City, is an unincorporated community in Douglas County, Oregon, United States.

For statistical purposes, the United States Census Bureau has defined Winchester Bay as a census-designated place (CDP).

The local Winchester Bay Merchant Association promotes economic development in the community.

[12] Tourism is a significant component of the economy with recreational vehicle use on the nearby sand dunes, tours of the Umpqua River Lighthouse, and crabbing in the bay as the primary attractions.

[13] In recent years, Siuslaw National Forest enforcement of alcohol consumption and under-age drinking was enacted to improve safety for participants.

[16] Media related to Winchester Bay, Oregon at Wikimedia Commons