Far-right politics, often termed right-wing extremism, encompasses a range of ideologies that are marked by ultraconservatism, authoritarianism, ultranationalism, and nativism. This political spectrum situates itself on the far end of the right, distinguished from more mainstream right-wing ideologies by its opposition to liberal democratic norms and emphasis on exclusivist views. Far-right ideologies have historically included fascism, Nazism, and Falangism, while contemporary manifestations also incorporate neo-fascism, neo-Nazism, white supremacy, and various other movements characterized by chauvinism, xenophobia, and theocratic or reactionary beliefs.

Key to the far-right worldview is the notion of societal purity, often invoking ideas of a homogeneous "national" or "ethnic" community. This view generally promotes organicism, which perceives society as a unified, natural entity under threat from diversity or modern pluralism. Far-right movements frequently target perceived threats to their idealized community, whether ethnic, religious, or cultural, leading to anti-immigrant sentiments, welfare chauvinism, and, in extreme cases, political violence or oppression. According to political theorists, the far right appeals to those who believe in maintaining strict cultural and ethnic divisions and a return to traditional social hierarchies and values.

In practice, far-right movements differ widely by region and historical context. In Western Europe, they have often focused on anti-immigration and anti-globalism, while in Eastern Europe, strong anti-communist rhetoric is more common. The United States has seen a unique evolution of far-right movements that emphasize nativism and radical opposition to central government.