A treehouse, tree house, or treefort is a habitable structure built in trees.

Treehouse may also refer to:

• Tree House, Crawley, a listed 14th-century building in Crawley, West Sussex, United Kingdom; originally the manor house
• The Tree House, a 21-story student residence at Massachusetts College of Art and Design

• Treehouse (The Grapes of Wrath album), 1987
• Tree House (Franciscus Henri album), 1987
• Treehouse (I See Stars album), 2016
• Treehouse (Sofi Tukker album), 2018
• "Treehouse" (song), a 2019 song by James Arthur and Ty Dolla Sign featuring Shotty Horroh

• Treehouse (film), 2014 released horror film
• Treehouse TV, a Canadian preschool television station owned by YTV (Corus Entertainment)
• "Treehouse" (Into the Dark), an episode of the first season of Into the Dark
• "Treehouse" (Modern Family) an episode of the American sitcom Modern Family
• "Tree House" an episode of the Nickelodeon sitcom Drake & Josh

• The Treehouse (video game), an educational game by Brøderbund Software
• Treehouse (company), a for-profit education company
• TreeHouse School, a special school in London, United Kingdom that specialises in educating children and young people with autism
• Tree House Brewing Company, a brewery in Charlton, Massachusetts
• TreeHouse Foods, food processing company
• Treehouse (game), a boardgame using Icehouse pieces
• "Treehouse", a hackers' paradise from the book Otherland: City of Golden Shadow by Tad Williams

• Treehouse of Horror, the annual Halloween special on the television series The Simpsons
• Creepy treehouse, a social media term
• Magic Tree House, series of children's books by Mary Pope Osbourne
• Magic Tree House (film) anime film based on the children's books