William Greene (17 January 1748 – 3 June 1829) was an Anglo-Irish parliamentarian and public official.
He was a member of the second Parliament of the United Kingdom after the Act of Union 1801, representing the constituency of Dungarvan from 1802 to 1806.
He was commissioned as a cadet in the East India Company's Bengal Army in 1769, and promoted lieutenant in 1772, captain in 1779, and major in 1785.
William held the Dungarvan seat from the 1802 general election until the dissolution of parliament in October 1806, as a Whig.
According to an agent of William Cavendish, 5th Duke of Devonshire, a political opponent, he was "extremely unpopular in the town, from his being an harsh landlord, and from his having been long in India he has contracted some very arbitrary habits".