Hillbilly is a term (often derogatory) for people who dwell in rural, mountainous areas in the United States, primarily in the Appalachian region. As people migrated out of the region during the Great Depression, the term spread northward and westward with them.

The first known instances of "hillbilly" in print were in The Railroad Trainmen's Journal (vol. ix, July 1892), an 1899 photograph of men and women in West Virginia labeled "Camp Hillbilly", and a 1900 New York Journal article containing the definition: "a Hill-Billie is a free and untrammeled white citizen of Alabama, who lives in the hills, has no means to speak of, dresses as he can, talks as he pleases, drinks whiskey when he gets it, and fires off his revolver as the fancy takes him". The stereotype is twofold in that it incorporates both positive and negative traits: "Hillbillies" are often considered independent and self-reliant individuals who resist the modernization of society, but at the same time they are also defined as backward and violent. Scholars argue this duality is reflective of the split ethnic identities in white America. The term's later usage extended beyond solely white communities, exemplified with the "Hispanic hillbillies of northern New Mexico," in reference to the Hispanos of New Mexico.