Major General William Alington, 3rd Baron AlingtonLL (bef. 1641 – 1 February 1685) was an Irish peer.
Alington was the son of William Alington, 1st Baron Alington and Elizabeth Tollemache. He succeeded to the title of 3rd Baron Alington of Killard, County Cork circa March 1660, on the death of his brother the 2nd Baron who died without male issue.
In 1664, he was elected Member of Parliament for Cambridge in a by-election to the Cavalier Parliament and was re-elected for the same constituency in 1679 and 1681.[1] He was created 1st Baron Alington of Wymondley, Hertfordshire on 5 December 1682.