William Peck
William Peck may refer to:
- William Peck (astronomer), Scottish astronomer and instrument maker
- William Peck (MP) for New Shoreham
- William Buckley Peck American physician, surgeon, and founder of the Inter-State Postgraduate Medical Association of North America
- William Dandridge Peck, American botanist and entomologist
- William E. Peck, American school administrator, founder of Pomfret School in Connecticut
- William H. Peck, American writer
- William R. Peck, American plantation owner, politician, and Confederate Army general
- William S. Peck Jr., Louisiana state representative
- William S. Peck Sr., Louisiana state representative
- William Virgil Peck, Associate Justice of the Supreme Court of Ohio
- William Ware Peck, Justice of the Territorial Wyoming Supreme Court
- Bill Peck, American guitarist
- Bill Peck (American football), American football player and coach