William Forster (died 10 Jan 1574/5) was an English politician and sheriff of Berkshire.
William was the son of Sir Humphrey Forster of Aldermaston House in Berkshire and father of Sir Humphrey Forster.[1] He was educated at Oxford University and Lincoln's Inn.
In 1572, during the reign of Elizabeth I of England, he was elected the Member of Parliament for Berkshire but died in office two years later.[2] He was also appointed High Sheriff of Berkshire in 1569.[1]
He died in 1575. He had married Jane, the daughter of Sir Anthony Hungerford of Down Ampney, Gloucestershire;they had five sons, including his heir Sir Humphrey, and three daughters.