Pazardzhik is a city situated along the banks of the Maritsa river, southern Bulgaria. It is the centre of Pazardzhik Province and Pazardzhik Municipality. It is located in the Upper Thracian Plain and in the Pazardzhik-Plovdiv Field, a subregion of the plains. It is west of Plovdiv, about 37 kilometres (23 mi), 112 kilometres (70 mi) southeastern of Sofia and 288 kilometres (179 mi) from Burgas. The population is 55,220, as it has been growing around from the end of the 19th century to the end of the 20th century. The city reached its highest milestone, exceeding 80,000. Due to poor economic performance in Bulgaria during the 1990s and early 2000s, emigration of Bulgarians began, which affected Pazardzhik as well.

Maritsa or Maritza, also known as Meriç and Evros, is a river that runs through the Balkans in Southeast Europe. With a length of 480 km (300 mi), it is the longest river that runs solely in the interior of the Balkan peninsula, and one of the largest in Europe by discharge. It flows through Bulgaria in its upper and middle reaches, while its lower course forms much of the border between Greece and Turkey. Its drainage area is about 53,000 km2 (20,000 sq mi), of which 66.2% is in Bulgaria, 27.5% in Turkey and 6.3% in Greece. It is the main river of the historical region of Thrace, most of which lies in its drainage basin.