AMC-18 is a geostationary Lockheed Martin A2100A communications satellite owned by SES Americom.

It was launched on 8 December 2006 from Centre Spatial Guyanais aboard an Ariane 5 ECA launch vehicle and is situated at 83° West longitude, providing coverage of North America with twenty-four C-band transponders of 12–18 watts each.

Future users in May 2007 include The CW Television Network, NASA TV and Canadian Broadcasting Corporation, among other services.

AMC-18 is used by thousands of terrestrial radio stations for network feeds using ground equipment from Starguide, X-Digital Systems, Wegener and International Datacasting.

Originally built as a ground spare to the AMC-10 and AMC-11 satellite program, AMC-18 is optimized for digital television distribution from the center of the U.S. orbital arc.