<i><b>Coast to Coast AM</b></i> 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. Eastern Time Zone. <sup id="cite_ref-affiliatecount_1-0" class="reference"></sup>It appears on over 600 affiliates, and has repeatedly been called the most popular overnight show in the country.<sup id="cite_ref-NYT1_3-0" class="reference"></sup>

In 1978, Art Bell created and hosted <i>West Coast AM</i>, a late-night political talk/call-in show on Las Vegas radio station KDWN. <sup id="cite_ref-knight_4-0" class="reference"></sup>In 1988, Bell and Alan Corberth renamed the show <i>Coast to Coast AM</i> and moved its studios from the Plaza Hotel in Las Vegas to Bell's home in Pahrump. <sup id="cite_ref-knight_4-1" class="reference"></sup>After Bell's retirement, the show was hosted by various personalities, including Mike Siegel, George Noory, and others.

At its peak, <i>Coast to Coast AM</i> under Bell was syndicated by Premiere Radio Network, and aired on more than 500 radio stations and boasted a weekly listening audience in excess of 10 million listeners. Since 2013 the weekly listener numbers have declined to 2.5 million.<sup id="cite_ref-talkers.com_8-0" class="reference"></sup> According to estimates by <i>Talkers Magazine</i>, <i>Coast to Coast AM</i> has a cumulative weekly audience of around 2.75 million unique listeners listening for at least five minutes, making it the most listened-to program in its time slot.<sup id="cite_ref-talkers2.15_9-0" class="reference"></sup> By 2010 the program was known as by far the most popular overnight show in the country,<sup id="cite_ref-Lavin_2-1" class="reference"></sup> echoed by <i>The New York Times</i> in 2017, citing Nielsen ratings.<sup id="cite_ref-NYT1_3-1" class="reference"></sup>

The show is estimated to be carried by over 600 US affiliates,<sup id="cite_ref-affiliatecount_1-1" class="reference"></sup> along with a limited number of FM stations, as well as many Canadian affiliates, several of which stream the show on their station's website. The affiliate group is fronted by 12 clear-channel stations, among them WBT in Charlotte, WHO in Des Moines, WWL in New Orleans, WOR in New York City, KFBK in Sacramento, and KFI in Los Angeles. The show is also carried by Sirius XM Radio, on its Road Dog Trucking channel 146.