Sir John Rous, 1st Baronet (c. 1608 – 27 November 1670) was an English politician who sat in the House of Commons from 1660 to 1670.

He lived quietly during the Commonwealth of England but was in correspondence with the exiled Stuart court; on 27 April 1660, Charles II wrote to him from Breda to express appreciation of his loyalty.

He was created a baronet, of Henham, Suffolk in the Baronetage of England on 17 August 1660, in reward for his loyalty to the king.

In 1661 he was re-elected MP for Dunwich in the Cavalier Parliament, of which he was a moderately active member, and sat until his death in 1670.

His activity in the Commons declined after 1664 and on 15 December 1666 he was summoned to parliament to answer for his prolonged non-attendance.