The area of present-day Zadar traces its earliest evidence of human life from the late Stone Age, while numerous settlements date as early as the Neolithic[citation needed]. Before the Illyrians, an ancient Mediterranean people of a pre-Indo-European culture inhabited the area. Zadar traces its origin to its 9th-century BC founding as a settlement of the Illyrian tribe of Liburnians known as Iader.

Today, Zadar is a historical center of Dalmatia, Zadar County's principal political, cultural, commercial, industrial, educational, and transportation centre. Zadar is also the seat of the Roman Catholic Archdiocese of Zadar. Because of its rich heritage, Zadar is today one of the most popular Croatian tourist destinations, named "entertainment center of the Adriatic" by The Times and "Croatia's new capital of cool" by The Guardian. In 2016 the Belgian portal Europe's Best Destinations.com named Zadar the "Best European Destination" after a three-week period of online voting involving more than 288,000 votes.