Fox News is an American basic cable and satellite television channel owned by Fox Corporation. Since its creation by Rupert Murdoch's News Corporation in 1996, the channel has been the subject of several controversies and allegations.

Fox News has been described by academics, media figures, political figures, and watchdog groups as being biased in favor of the Republican Party in its news coverage, as perpetuating conservative bias, and as misleading their audiences in relation to science, notably climate change and COVID-19.

Fox News was sued for defamation in 2021 by voting machine companies Dominion Voting Systems and Smartmatic, alleging the network's hosts and guests knowingly promoted falsehoods that their voting machines were rigged to prevent Donald Trump's reelection in the 2020 presidential election. The companies sought a total of $4.3 billion in damages. Fox News agreed to pay $787.5 million to resolve the suit.

Fox News has been identified as practicing biased and false reporting in favor of the Republican Party, its politicians, and conservative causes, while portraying the Democratic Party in a negative light. Fox News has been characterized by critics, commentators, and researchers as an advocacy news organization and as damaging to the integrity of news overall. It has been criticized for sharing propaganda. The network is pro-Trump. During and after the 2020 presidential election, its primetime hosts promoted Trump and the Republican Party, and host Jeanine Pirro was in communication with the chair of the Republican National Committee.

By 2017, a growing number of studies and academic literature found Fox's prime-time programming engaging in rhetorical and nonfactual themes similar to propaganda and not journalism or persuasion. Academic studies have argued that it has played a major role in boosting Republican turnout in American elections and that its role in American politics has been underestimated by political and communications scholars. Fox has been described as operating in an information silo where its audience views other media sources as "too liberal", and thus rely on Fox and no other forms of news media. Researchers and commentators have compared conservative Fox News as similar in purpose to liberal MSNBC, but that "the proportion of Fox News statements that are mostly false or worse is almost 50 percent higher than for MSNBC, and more than twice that of CNN".

In documents filed as part of the Smartmatic v. Fox News defamation lawsuit (2025), internal survey responses from Fox News employees, conducted between August 24 and September 8, 2020, revealed concerns about the network’s political alignment and editorial practices. Several employees stated that they believed the network was “intentionally helping Donald Trump and the Republican Party,” described its programming as “sexist, racist, and right-wing,” and expressed moral discomfort with their work environment. For example, one employee wrote that they felt “ashamed to tell others I work here.” Some comments criticized high-profile hosts by name for promoting what the respondents characterized as conspiracy theories and partisan narratives.

Former Democratic National Committee chairman Howard Dean has referred to Fox News as a "right-wing propaganda machine", and several Democratic politicians have boycotted events hosted or sponsored by the network. In 2007, several major Democratic presidential candidates (Hillary Clinton, John Edwards, Barack Obama, and Bill Richardson) boycotted or dropped out of Fox News-sponsored or -hosted debates. The DNC reaffirmed their boycott in 2019.

Similar accusations were levied against Fox News in response to its decision to exclude Ron Paul and Duncan Hunter from the January 5, 2008, Republican primary debate. In response, many individuals and organizations petitioned Fox News to reconsider its decision. When Fox News refused to change its position and continued to exclude Paul and Hunter, the New Hampshire Republican Party officially announced it would withdraw as a Fox News partner in the forum.