Sir Robert Cotton, 1st Baronet (c. 1635 – 18 December 1712) was an English politician. He was Member of Parliament (MP) for Cheshire from 1679 to 1681 and from 1689 to 1702.
In 1677 he was made Baronet of Combermere in the County Palatine of Chester.
After he was accused of treasonable correspondence with the Electress of Hanover, Sophia, in 1685 he was committed to the Tower of London by the Earl of Sunderland, Secretary of State for the Southern Department. He was eventually cleared of the charges.
He 1684 he married Hester Salusbury, daughter and sole heir of Royalist politician and soldier Sir Thomas Salusbury. As a result, the family's seat at Combermere Abbey was enhanced with the Llewenni Estate in Denbighshire, northeast Wales.The couple had the following known issue: