Other
- Harley-Davidson motorcycles
- Harley Owners Group (H.O.G.), a club for Harley-Davidson motorcycle owners
- Harley Benton Guitars, a brand name created by German music instrument retailer Thomann
- Harley Lyrics, a 14th-century collection of poems
- Harley Street (TV series), a British television medical drama
- The Harleian Collection of manuscripts in the British Library
- The Harley School, a school in Rochester, New York
- Harley Ellis Devereaux, an architecture and engineering firm based in Southfield, Michigan, U.S.
- Steve Harley & Cockney Rebel, an English rock band from the early 1970s
- Harley Psalter, an 11th-century illustrated manuscript
- Harley's Humongous Adventure, a 1992 video game
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