Luka (župa)
Luka was a župa of the medieval principality of Zahumlje located in parts of Bosnia and Herzegovina, and Croatia. It was situated in a swampy area on both sides of the Neretva river, from the Bregava and the Trebižat, down to the Neretva Delta and Adriatic Sea. It bordered the župas of Rastok, Vučerić, Drijeva and the Adriatic Sea.