Faction or factionalism may refer to:

• Political faction, a group of people with a common political purpose
• The Faction, an American punk rock band
• Faction (Planescape), a political faction in the game Planescape
• Faction (literature), a type of historical novel based on fact
• Factions (Divergent)
• The Faction, an Atlanta United supporters' group
• Faction fighting, an English term for Irish mass stick fights, see Bataireacht

• All pages with titles beginning with The Faction
• All pages with titles beginning with Faction
• All pages with titles containing Faction