OR4 or OR-4 may refer to:

• Other ranks (UK)
• Oregon's 4th congressional district
• Oregon Route 4, part of U.S. Route 97 in Oregon

• Buckley syndrome
• Buckley (TE)-Class Destroyer Escort
• Buckley Tivoli
• Buckley Town F.C.
• Buckley, Venerable John
• Buckley v valeo
• Buckley v. valeo
• Buckley v. valleo
• Buckley, William
• Buckley–Leverett equation
• Buckling (disambiguation)
• Buckling (fish)
• Bucklin Township, Michigan
• Bucklin Voting
• Buck Llewellyn
• Bucklow Rural District
• Bucklow (UK Parliament constituency)
• Buckly v. valleo
• Buck MacDonald
• Buckman and Ulmer Building
• Buckman Arts Magnet Elementary School
• Buckman hall
• Buckman Hall
• Buckman Hall (Gainesville, Florida)
• Buckman, Oregon