Tropolje was a historical Croatian duchy, which was located on the borderland of Croatia, Bosnia and Zachlumia. Its exact borders are disputed among historians.

Vjekoslav Klaić thought that Tropolje encompassed the Cetinsko Polje, Livanjsko Polje and Duvanjsko Polje, and possible other poljes on the borderland of Croatia, Bosnia, and Zachlumia. Marko Perojević, on the other hand, argued that Tropolje included the Kosovo Polje (near Knin), Petrovo Polje (near Drniš) and Mućko Polje. Additionally, Dominik Mandić included Livanjsko Polje as well. Sima Ćirković held that Tropolje stretched over Livanjsko Polje, Duvanjsko Polje and Glamočko Polje.^[1] Krunoslav Draganović and Damir Karbić argued that Tropolje included Duvanjsko Polje, Kupreško Polje, and Glamočko Polje. Karbić, agreeing with Draganović, said that a document from 1301 supports his conclusion and that the northern borders thus defined, fitted the borders of the Diocese of Duvno.^[2] The document from 1301, to which Karbić was referring, mentions the sons of Paul I Šubić of Bribir – Mladen, George and Paul, as "Duke of Tropolje, Livno and Cetina", who adopted the title on the verge of the 13th to 14th century after securing the territory of the eastern Adriatic hinterland.^[2][3]

v t e Regions of Bosnia and Herzegovina
Geographical	Main Bosnia Herzegovina Regions Bosanska Krajina Podrinje a.k.a. Eastern Bosnia Posavina Semberija Srednja Bosna Sub-regions Gatačko polje Popovo Polje Polimlje Romanija Glasinac Birač Osat Ludmer Cazinska Krajina a.k.a. Western Bosnia Potkozarje Knešpolje Lijevče Prijedorsko polje Majevica
Historical	Zemlja (sub-regions) Bosna Vrhbosna Podrinje Polimlje Glasinac Donji Kraji Tropolje Završje Zapadne Strane Hum or Humska zemlja Zagorje Podgorje Bosansko Primorje Krajina Zachumlia Travunija Konavle Gornja Zeta Rudine Usora Soli Posavlje Terra Tolis Župa Mel Vidogošća Lašva Tilava Smučka Lepenica Vrhbosna Dubrovnik Kraljeva Sutjeska Olovac (Olovci) Bored (Brod) Borač Uskoplje Rama Primorje Popovo Dabar Ljubinje Ljubomir Dubrava Zažabalje Vidoši Vatnica Trusina Rudine Bileća Trebinje Vrm Dračevica Nevesinje Gacko Viševa Župa Komska Bijela Dbar Neretva Drežnica Blato Planina Dlamoč Hlivno Bistrica Duvno Veljaci Rastok Posušje Rakitno Pljeva Zagorje Kalinovik Piva Sutjeska Ostrovica Drinaljevo Bistrica Hoča Breznica Drina Goražde Gobza Brodar Međurječje Pribud Dobrun Osat Birač Srebrenica Ludmer Drametin Sapna Zaušje Soli Visori Koraj Gradačac Nenavište Modrna Tolisa (Terra Tolisa) Vrbas Glaž Hum Ukrina Usora Tešanj Luke Vrbanja Sana Zemljanik Mrin Pset Banice Unac Poljana