Sandanski Municipality with its 1060 sq. Km. is the largest municipality in the Blagoevgrad region, third in the South-West region and the ninth largest in the Republic of Bulgaria. It covers 54 settlements - the towns of Sandanski and Melnik and 52 villages.

The city, situated at an altitude of 220-240 m., Is the warmest Bulgarian city in all seasons, with the duration of sunshine exceeding 2 450 hours, creating conditions for year-round solar-air procedures.