William Cochran
William Cochran may refer to:
- William Thad Cochran (born 1937), U.S. Senator from Mississippi
- William Gemmell Cochran (1909–1980), British-American statistician
- William Cochran (physicist) (1922–2003), British physicist
- William Cochran (tenor) (born 1943), operatic tenor
- William D. Cochran, American football player
- William Cochran (artist) (1738–1785), Scottish painter