The oleander is a poisonous plant grown as an ornamental.

Oleander may also refer to:

• The Oleander wattle, tree native to Australia
• Oleander, California, in Fresno County
• MV Oleander, ferry
• Oleander moth, Syntomeida epilais
• Oleander hawk-moth, Daphnis nerii
• Oleander-Rennen, German horse race
• Oleander (band), American post-grunge band, or their debut EP
• Matt Oleander, a fictional character in Degrassi: The Next Generation
• Morceau Oleander, a fictional character in Psychonauts
• Oleander, one of the main characters in the video game Them's Fightin' Herds.

• White Oleander, 1999 coming-of-age novel by Janet Fitch
• White Oleander (film), 2002 drama film based on the aforementioned novel