Trogir is a historic town and harbour on the Adriatic coast in Split-Dalmatia County, Croatia, with a population of 10,107 and a total municipal po…Trogir is a historic town and harbour on the Adriatic coast in Split-Dalmatia County, Croatia, with a population of 10,107 and a total municipal population of 12,393. The historic part of the city is situated on a small island between the Croatian mainland and the island of Čiovo. It lies 27 kilometres west of the city of Split.