科佩尔（斯洛文尼亚语：Koper；意大利语：Capodistria），位于斯洛文尼亚西南部与意大利的边境地区，亚得里亚海北端，是斯洛文尼亚全国唯一的商业港口。该市全境约311平方公里，人口47539人，斯洛文尼亚语和意大利语同为该市官方语言。

科佩尔早在希腊化时代便已建城，希腊语称之为Aegida，其拉丁语名称Capris更为流行，今日Koper一词便是Capris的变音。568年，附近罗马帝国城市的里雅斯特的大量市民为躲避伦巴德人入侵而逃来该市，使得该市开始繁荣。当时，该市处于东罗马帝国治下，其名字也为纪念查士丁尼二世而改为“查士丁诺波尔”。不久以后，该地被并入伦巴底王国，后又随着伦巴底被兼并入法兰克王国。

Koper (Slovene pronunciation: [ˈkoːpəɾ]) (Italian:Capodistria) is a city in southwestern Slovenia, with the other Slovenian coastal towns Ankaran, Izola, Piran, and Portorož, situated along the country's 47-kilometre (29-mile) coastline, in the Istrian Region, approximately five kilometres (3.1 miles) from its border with Italy. Having a unique ecology and biodiversity, it is considered an important national natural resource. The city's Port of Koper is the major contributor to the economy of the eponymous city municipality. With only one percent of Slovenia having a coastline, the influence that the Port of Koper also has on tourism was a factor in Ankaran deciding to leave the municipality in a referendum in 2011 to establish its own. Koper is the main urban centre of the Slovenian Istria, with a population of about 25,000.