Classism is the discrimination of a person on the basis of his or her social origin or social position. This can also affect privileged social groups, but classism usually aims in the opposite direction: lower income or a lower level of institutional education are often cited as markers for this. This is accompanied by various stereotypical ideas and attitudes toward the attribution of an origin milieu. The term originates from the 1970s and was coined in the USA by the lesbian collective The Furies.

Classism is one of the most common forms of discrimination, along with rejectionism, antiziganism, anti-Semitism, racism, sexism and homophobia.