William Bill (c. 1505 – 15 July 1561) was Master of St John's College, Cambridge (1547–1551?), Vice-Chancellor of the University of Cambridge (1548) and twice Master of Trinity College, Cambridge (1551–1553, 1558–1561), Provost of Eton College (1558–1561) and Dean of Westminster (1560–1561). He was buried in St Benedict's Chapel, Westminster Abbey, where his tomb and small brass figure can still be seen. There are varying reports of whether or not he married.