A folly is a decorative building.
Folly most often also refers to: Foolishness, the lack of wisdom Folly fort, a military fort built on water near a shore
Folly may also refer to:
Arts and entertainment Folly (allegory), a common allegorical figure in medieval morality plays and in allegorical artwork through the Renaissance Folly (band), a band from Sussex, New Jersey Folly, an 1886 statue by Edward Onslow Ford Folly, a 1994 novel by Susan Minot Folly (magazine), a literary magazine from New Zealand
Places New Zealand Folly Island, New Zealand, in the Campbell Island group
United States Folly, Virginia, an unincorporated community Folly (Staunton, Virginia), a historic plantation house Folly Island, a barrier island near Charleston, South Carolina
Rivers in England Folly Brook, Barnet, London Folly Brook, a tributary of the River Frome, Bristol Folly Brook, a tributary of the River Clun, Shropshire
Other uses Tree ring (landscape feature), also once popularly called a folly, a decorative feature of 18th and early 19th century planned landscapes in Britain and Ireland Folly (color), a color one-fourth of the way between crimson and rose, closer to crimson than to rose Folly (SP-1453), a sailing schooner that served in the United States Navy as a patrol vessel during World War I Yoann Folly (born 1985), French-born Togolese football player
See also Seward's Folly, another name for the purchase of Alaska Folie (disambiguation) Follies (disambiguation) Foley (disambiguation) FoLLI, an international, especially European, learned society