Petrich municipality is situated in the southern part of Sofia county and in the southwestern part of Bulgaria on an area of 650 000 decares. It is bordered on the northeast by Sandanski municipality and on the north - by Srumyani municipality. To the west and to the south there are state borderlines borders - respectively with Macedonia and Greece. Petrich municipality is an active Balkan and European cross-road between two seas - it is 90 km far from Tessaloniki port at the White Sea, where Bulgaria has an independent sector for commercial exchange on the Mediterranean sea and 380 km. far from Valyora port in Albania on the Adriatic Sea.