Ralph Jenison (c. December 1696 – 15 May 1758) of Elswick Hall near Newcastle, Northumberland and Walworth Castle, county Durham was a British politician who sat in the House of Commons between 1724 and 1758.
He was politically connected with Charles Bennet, 2nd Earl of Tankerville and succeeded him as Master of the Buckhounds in 1737.
He acted as agent to Lord Ossulston, Tankerville's son, at a by-election for Northumberland in February 1748 and this may have been rewarded by his return as MP for Newport (Isle of Wight) at a by-election on 20 June 1749, when Tankerville's brother-in-law, Lord Portsmouth, was governor of the island.
[1] At the 1754 general election Jenison was returned unopposed for Newport but incurred high expenses which may have been paid from secret service money.
In 1757 he lost his post of as Master of the Buckhounds again and was offered a secret service pension in compensation, which was finally settled at £1,800.