William Biddle

William Biddle may refer to:
 * William P. Biddle (1853–1923), 11th Commandant of the United States Marine Corps
 * William W. Biddle (1900–1973), American psychologist, major contributor to the study of propaganda
 * William Biddle Shepard (1799–1852), congressional representative from North Carolina
 * USS William P. Biddle (APA-8), a Heywood-class attack transport