William Cawley (born April 7, 1629) was an English lawyer and politician who sat in the House of Commons in 1659 and 1660.
Cawley was the eldest son of William Cawley the regicide, and his first wife Catherine Walrond, daughter of William Walrond of Isle Brewers, Somerset.
He entered Inner Temple on November 10, 1645 at age 16, and was called to the bar in 1652.
Cawley succeeded his father who had died in exile in 1667.
In 1680 William Cawley published a book The Laws of Queen Elizabeth, King James and King Charles the First but by 1700 he was reduced to poverty and dependent on a grant of £5 from the Inner Temple.