Sir Robert Geoffrey Ellis, 1st Baronet (4 September 1874 in Shipley, West Yorkshire – 28 July 1956) was a Conservative Party politician in the United Kingdom. Ellis was educated at Peterhouse, Cambridge. He was elected as Member of Parliament (MP) for Wakefield at the 1922 general election, but lost the seat at the 1923 general election. He was re-elected in 1924, but defeated again in 1929. He was made a baronet, of Threshfield in the West Riding of the County of York, in 1932.