William Plummer (disambiguation)

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.