5R may refer to: Yaesu VX-5R, an ultra-compact amateur radio transceiver IRS Aero IATA designator Karthago Airlines IATA designator Madagascar aircraft registration code A standard consumer print size for photographs. See Standard photographic print sizes. 5R, the production code for the 1980 Doctor Who serial Full Circle 5R Fulton Rapid, a San Francisco bus line

See also R5 (disambiguation)