Owl is the name of any one of about 220 species of mainly nocturnal birds of prey. In addition, Owl may refer to:

Sheffield Wednesday, an English football club are nicknamed the Owls

Florida Atlantic Owls, the athletics teams of Florida Atlantic University

Object Windows Library, an object-oriented software framework for creating Microsoft Windows applications, created by Borland

Temple Owls, the athletic teams of Temple University

Web Ontology Language, a markup language for publishing and sharing data using ontologies on the World Wide Web

Owl (comics), a villain in Marvel Comics

Owl (Winnie the Pooh), a character in the Winnie the Pooh stories

Overwhelmingly Large Telescope, a proposed optical telescope that would use a 100-meter-diameter main reflector

Older Women's League, a US grassroots organization advocating for midlife and older women

Our Whole Lives, a sexuality curriculum jointly produced by the Unitarian Universalist Association and the United Church of Christ, with versions for students and adults

Official Tournament and Club Word List, the National Scrabble Association's official word authority for tournament Scrabble in North America

Uni-Norths Owls, an Australian rugby union club

Online Writing Lab, usually an extension of a college or university writing center

Owl (magazine), a children's/educational magazine published in Canada

Owls (band), an indie-rock band from Chicago, Illinois

Grand Rapids Owls, a defunct International Hockey League team

Chicago Owls, a defunct professional American football team based in Chicago

Ostwestfalen-Lippe, an area in the federal state North Rhine-Westphalia in Germany

Office Workstations Limited, maker of the Guide hypertext program.