Shirley, Missouri
Shirley is an unincorporated community in Washington County, in the U.S. state of Missouri. The community is on Missouri Route 8 approximately six miles west of Potosi. Allen Branch flows through the community and enters the Sunnen Reservoir one mile to the north. History. A post office called Shirley was established in 1894, and remained in operation until 1955. The community has the name of James Shirley, a local merchant. Susan Cave (23WA190) was listed on the National Register of Historic Places in 1989.