William Plummer (1873–1943) was an African American cabinetmaker and inventor from Smyth County, Virginia.
William Plummer may also refer to: William Edmunds Plummer (1861–1918), member of the Wisconsin State Assembly W. H. Plummer (1860–1926), member of the Washington State Senate Bill Plummer (1947–2024), American baseball player and manager.
See also William Plumer (disambiguation)