| Honorific Prefix: | Sir |
| Robert Archibald Cary | |
| Honorific Suffix: | 1st Baronet |
| Constituency Mp: | Manchester Withington |
| Term Start: | 25 October 1951 |
| Term End: | 8 February 1974 |
| Predecessor: | John Potter |
| Successor: | William Proctor |
| Constituency Mp1: | Eccles |
| Term Start1: | 14 November 1935 |
| Term End1: | 15 June 1945 |
| Predecessor1: | Frederick Cundiff |
| Successor1: | Fred Silvester |
| Birth Date: | 25 May 1898 |
| Birth Place: | London, England |
| Children: | Roger Hugh Cary |
| Parents: | Robert Cary Alice Day |
| Relatives: | Artuhur Frederick Johnson (uncle-in-law) and Alice Cary (aunt) William Richard Cary (uncle) Isabella Ann Cary (aunt) and Henry George Shore (uncle-in-law) |
Sir Robert Archibald Cary, 1st Baronet (25 May 1898 – 1 October 1979) was a British Conservative politician.
The son of Robert Cary and Alice Day, he was educated at Ardingly College and at the Royal Military College, Sandhurst. Serving to the 4th/7th Royal Dragoon Guards, Cary fought in the First World War and Second World War.
From 1939 to 1942, he was Parliamentary Private Secretary to the Civil Lords of the Admiralty, from 1942 to 1945 to the Secretary of State for India and Burma. In 1944 and 1945, he was Assistant Government Whip and Junior Lord of the Treasury between May and July 1945. From 1951 to 1955 he was again Parliamentary Private Secretary, this time to the Lord Privy Seal and Leader of the House of Commons
Cary was Member of Parliament (MP) for Eccles from 1935 to 1945 and for Manchester Withington from 1951 until his retirement at the February 1974 general election. Knighted already in 1945, he was created a baronet, of Withington in the County Palatine of Lancaster on 12 July 1955.
On 30 April 1924, he married Rosamond Mary Scarsdale, daughter of Colonel Alfred Nathaniel Curzon, son of Alfred Nathaniel Holden Curzon, 4th Baron Scarsdale. They had one son, Sir Roger Hugh Cary, 2nd Baronet.