William Whiteway (1570–1640) was an English merchant and politician who sat in the House of Commons in 1624 and 1625.
Whiteway was born at Denbury, Devon and left his home town to become an apprentice merchant.
In 1590 he was imprisoned as a Protestant in Honfleur, France.
He settled permanently in Dorchester in 1600 as a merchant and was successful in trade, especially with France.
He was re-elected MP for Dorchester in 1625 and was bailiff in 1626.