RCN may refer to:
- RCN Corporation (formerly Residential Communications Network), a cable television, telephone, and Internet service provider in the United States
- RCN Radio (Radio Cadena Nacional), a radio network in Colombia
- RCN TV, (Radio Cadena Nacional) a private television network in Colombia affiliated with RCN Radio
- Red Cross Nordic United World College, a UWC in Norway
- Reality Check Network, a software based warez magazine that existed from 1995 to 1997
- Royal Canadian Navy, the navy of Canada
- Royal College of Nursing, a professional membership organisation of the United Kingdom
- Radiowe Centrum Nadawcze, Polish designation for a broadcasting transmitter
- The Republic of Cinnabar Navy in a series of books by David Drake
- The Reformed Church of Newtown, a church in the Queens, NY.
- Rundstrecken Challenge Nürburgring is a motorsport event series mainly on the Nürburgring