The Croat entity (Croatian: Hrvatski entitet), or Croat federal unit (Hrvatska federalna jedinica), also informally known as the "Third entity" (Treći entitet), is a proposed administrative unit of Bosnia and Herzegovina. Since the country is divided into two entities, Serb-dominated Republika Srpska and Bosniak-majority Federation, Croats, as one of the three equal constitutive nations, have periodically proposed creating a symmetrical Croat-majority territorial unit as a way to ensure their equality, prevent gerrymandering, simplify the political gridlock and dismantle overburdening administration.
During the Bosnian War (1992–95), Bosnian Croats founded their own sub-national entity, Herzeg-Bosnia, which de facto functioned as a mini state, with its own army, police, parliament etc. In 1994, under the Washington Agreement, Croats joined their territory, Herzeg-Bosnia, with the Bosniak-government controlled areas (the Republic of Bosnia and Herzegovina) to create a subnational entity, the Federation of Bosnia and Herzegovina (FBiH) with joint institutions. The 1995 Dayton Agreement that ended the war left the country divided into two political entities, the Serb-dominated and controlled Republika Srpska and this Bosniak-Croat Federation. FBiH was further divided into 10 autonomous cantons to ensure equality. The FBiH government and a bicameral Parliament were supposed to guarantee power-sharing and equal representation to the less numerous Croats.