Arthur Goodwin (circa 1593/94 – 16 August 1643) was an English lawyer and politician who sat in the House of Commons at various times between 1621 and 1643. He supported the Parliamentary cause during the English Civil War.
Goodwin was the son of Francis Goodwin (1564–1634), a landed gentleman of Upper Winchendon and his wife Elizabeth Grey (died 1630), daughter of Arthur Grey, 14th Baron Grey of Wilton. He was believed to have been born in 1593 or 1594 (being described as 40 years old in his father's will in 1634) He was educated in Oxfordshire at Lord Williams's School, was a law student of the Inner Temple in 1613 and graduated with BA from Magdalen College, Oxford on 10 February 1614.
In 1621 Goodwin was elected Member of Parliament for Wycombe. He was re-elected MP for Wycombe in 1624. In 1626, he was elected MP for Aylesbury.
In April 1640, Goodwin was elected with his friend John Hampden as MP for Buckinghamshire in the Short Parliament. He was re-elected MP for Buckinghamshire in November 1640 for the Long Parliament. Goodwin was a strong Parliamentarian and Puritan and opposed many of the policies of Charles I of England. When open war broke out between Parliament and the King, he gave substantial sums to the Parliamentarian cause, and commanded a cavalry regiment.