Koper is the fifth largest city in Slovenia. Located in the Istrian region in the southwestern part of the country, approximately five kilometres sout…Koper is the fifth largest city in Slovenia. Located in the Istrian region in the southwestern part of the country, approximately five kilometres south of the border with Italy, 10 kilometres north of the Croatian border, and 20 kilometres from Trieste, Koper is the largest coastal city in the country. It is bordered by the satellite towns of Izola and Ankaran. With a unique ecology and biodiversity, it is considered an important natural resource. The city's Port of Koper is Slovenia's only container port and a major contributor to the economy of the Municipality of Koper. The influence of the Port of Koper on tourism was one of the factors in Ankaran deciding to leave the municipality in a referendum in 2011 to establish its own municipality. The city is a destination for a number of Mediterranean cruising lines. Koper is the main urban centre of the Slovenian Istria, with a population of about 25,000. Aleš Bržan is the current mayor, serving since 2018.