Coast to Coast AM is an American late-night radio talk show that deals with a variety of topics. Most frequently the topics relate to either the paranormal or conspiracy theories. It was hosted by creator Art Bell from its inception in 1988 until 2003, and is currently hosted by George Noory. The program is distributed by Premiere Networks, a subsidiary of iHeartMedia, both as part of its talk network and separately as a syndicated program. The program now airs seven nights a week from 1:00–5:00 a.m. ET. It airs on over 600 affiliates, and has repeatedly been called the most popular overnight show in the country.

Talk radio is a radio format containing discussion about topical issues and consisting entirely or almost entirely of original spoken word content rather than outside music. They may feature monologues, dialogues between the hosts, interviews with guests, and/or listener participation which may be live conversations between the host and listeners who "call in" or via voice mail. Listener contributions are usually screened by a show's producers to maximize audience interest and, in the case of commercial talk radio, to attract advertisers.