Sir Roger Jenyns was an English landowner associated with Bottisham, Cambridgeshire. He served as High Sheriff of Cambridgeshire and Huntingdonshire in 1701–1702, was involved in the administration of the Bedford Level, and acquired the Manor of Allington and Vauxes in Bottisham before 1673. He died on 22 September 1740 and was buried at Holy Trinity Church, Bottisham.

The manor connection is directly supported by the Bottisham memorial inscription and independently corroborated by the Cambridgeshire historical account.

Research sources:
- William Cobbett, The Parliamentary History of England, or comparable early nineteenth-century county account reproduced in Magna Britannia, Cambridgeshire section: statement that Sir Roger Jenyns purchased the Manor of Allington and Vauxes in Bottisham several years before 1673; corroborated by the memorial inscription to Sir Roger Jenyns reproduced in the Gentleman's Magazine Library. — https://belnapfamily.org/Magna_Britannia_v2_part1.pdf
- Wikipedia biographical reference — https://en.wikipedia.org/wiki/Roger_Jenyns