William Peck may refer to:
William Peck (astronomer) (1862–1925), Scottish astronomer and instrument maker William Peck (MP) for New Shoreham William Buckley Peck (1870–1941) American physician, surgeon, and founder of the Inter-State Postgraduate Medical Association of North America William Dandridge Peck (1763–1822), American botanist and entomologist William E. Peck (1849–1897), American school administrator, founder of Pomfret School in Connecticut William H. Peck (1830–1892), American writer William R. Peck (1831–1871), American plantation owner, politician, and Confederate Army general William S. Peck Jr. (1916–1987), Louisiana state representative William S. Peck Sr. (1873–1946), Louisiana state representative William Virgil Peck (1804–1877), Associate Justice of the Supreme Court of Ohio William Ware Peck (1821–1897), Justice of the Territorial Wyoming Supreme Court Bill Peck (William Peck, born 1979), American guitarist Bill Peck (American football) (1926–2017), American football player and coach