Tenison or Tennison is a surname. Notable people with the surname include:
- Thomas Tenison (1636–1715), Archbishop of Canterbury
- Renee Tenison (born 1968), American model and actress
- Rosie Tenison (born 1968), American model and actress, identical twin sister of Renee Tenison
- Jeni Tennison, OBE Technical Director of the Open Data Institute
- Thomas Tenison, built Castle Tenison in 1820s, Keadue, Co. Roscommon, landowner, father of E.K. Tenison
- Edward King-Tenison (1805–1878), lived at Kilronan Castle, Keadue, Co. Roscommon, Irish photographer, landowner
- Lady Louisa Tenison, wife of E.K. Tenison, travel writer, and artist
- Henry King-Tenison, 8th Earl of Kingston (1848–1896), Irish peer and Conservative politician
- Eva Tenison (1880–1961), British historian and novelist
- Robin Hanbury-Tenison (born 1936), English explorer
Fictional characters:
- Jane Tennison, chief character in the British TV series Prime Suspect
Media:
- Prime Suspect 1973, a British TV show also known as Prime Suspect: Tennison or just Tennison