Liberty Lobby was a far-right think tank and lobby group founded in 1958 by Willis Carto. Carto was known for his promotion of antisemitic conspiracy theories, white nationalism, and Holocaust denial.

The organization produced a daily five-minute radio show called This is Liberty Lobby, which was broadcast on the Mutual Broadcasting System and other radio stations. At the conclusion of each show, listeners were invited to get a copy of its "America First" pamphlet.

Liberty Lobby described itself as "a pressure group for patriotism; the only lobby in Washington, D.C., registered with Congress which is wholly dedicated to the advancement of government policies based on our Constitution and conservative principles." According to Chip Berlet, Liberty Lobby presented itself as "a patriotic populist organization seeking to restore constitutional safeguards and national sovereignty" and said that it "consistently [denied] that it [was] the least bit antisemitic, much less neofascist or quasinazi".

Carto's Noontide Press republished Francis Parker Yockey's Imperium: The Philosophy of History and Politics, and also published a number of other books and pamphlets promoting a racialist and white supremacist world view, and Liberty Lobby in turn sold and promoted these books.

While Liberty Lobby was intended to occupy a niche as a conservative anti-Communist group, Carto was meanwhile forming other organizations which would take a much more explicit neo-Nazi orientation. Among these was the National Youth Alliance in 1968, which in the early 1970s became the National Alliance. Eventually Carto lost control of this organization, which fell into the hands of William Luther Pierce. Carto founded the Institute for Historical Review by 1978, a group known for publishing Holocaust denial books and articles. As with the National Youth Alliance and Noontide Press, the Institute for Historical Review fell out of Carto's hands in a hostile internal struggle. Liberty Lobby, however, remained under the control of Carto until it was disbanded in 2001.

During the 1968 United States presidential election Liberty Lobby distributed a pro-Wallace pamphlet entitled "Stand up for America", despite the campaign's denial of such a connection.

During the 1970s, as the anti-Communism of the 1950s and 1960s fell out of favor, Carto redefined the public image of Liberty Lobby, and began to describe it as a politically populist organization, rather than conservative or right-wing. Liberty Lobby also tried to create connections to the American political left by redistributing a report critical of President Jimmy Carter authored by frequent third-party presidential candidate Lyndon LaRouche and his NCLC. Scholar Daniel Smith writes that between the late 1960s and early 1980s, Liberty Lobby, along with the John Birch Society, institutionalized and became "ideological hubs" of the far-right. The organizations and their publications were influential in shaping the previous anti-internationalism into anti-globalism.

Liberty Lobby was infiltrated by journalist Robert Eringer, who wrote about the organization in Mother Jones in 1981. The organization campaigned against the ratification of the Genocide Convention.