''This article is about a political label. Most hardline music can also be referred to as hardcore/punk. For musical groups with similar names, see Hardline (band) or Hardliner (band). For the ecological philosophy, see hardline (subculture). Hardline is also a Computergame released 1996 by Virgin/Cryo.

In politics, hardline refers to the doctrine, policy, and posturing of a government or political body as being absolutist, or authoritarian. Hardline movements are usually extremist, militant, and uncompromising. Hardline movements range across the entire political spectrum, including black nationalism, objectivism, neo-Nazism, radical feminism, conservativism and anti-revisionism.