The name William Miller can refer to:

• The 19th-century American Baptist preacher (see William Miller (preacher))
• The governor of North Carolina from 1814 to 1817 (see William Miller (politician))
• A member of the Canadian Senate who served as Speaker from 1883 to 1887 (see William Miller (Canadian politician))
• The 39th United States Attorney General, who served from 1889 to 1893 (see William H.H. Miller)
• A United States Congressman who was the Republican Party nominee for Vice President of the United States in 1964 (see William E. Miller)
• A British chemist after whom the Miller crater is named (see William Allen Miller).