C98

C98 or C-98 may refer to:

• C-98 Clipper, the military designation of the Boeing 314 flying boat
• CJYC-FM, "Big John FM", formerly known as "C98"
• Cray C98, a model of the Cray C90
• Ruy Lopez (ECO code), a chess opening
• Lake Village Airport (FAA LID), Indiana, US
• Right to Organise and Collective Bargaining Convention, 1949 (ILO code)