Ayrton Senna (1960–1994), Brazilian F1 driver

Danzy Senna (born 1970), novelist

Formerly, plants in Cassia (genus) which used to include Senna

Bruno Senna (born 1983), race car driver and nephew of Ayrton Senna

Sanandaj (or Sine), a Kurdish city in western Iran

black senna, the Scrophulariaceae genus Seymeria

Marcos Senna (born 1976), Brazilian-Spanish footballer

bladder sennas, the legume genus Colutea

Senna Guemmour, German singer and member of Monrose (2006–)

Senna, the shinigami from the anime movie Bleach: Memories of Nobody

Senna, a character in the Babylon 5 novel Legions of Fire - Out of the Darkness

Senna (genus), a genus of legumes

scorpion sennas, plants in the legume genera Coronilla and Hippocrepis