Pirin Macedonia
Pirin Macedonia or Bulgarian Macedonia (Bulgarian: Пиринска Македония; Българска Македония) (Pirinska Makedoniya or Bulgarska Makedoniya), which today is in southwestern Bulgaria, is the third-biggest part of the geographical region of Macedonia. This part coincides with the borders of Blagoevgrad Province, as well as the surrounding area of Barakovo from Kyustendil Province. After World War I, Strumica and the surrounding area were broken away from the region and were ceded to Yugoslavia.
It covers an area of about 6,798 km2, which is 10.18% of the geographical region of Macedonia. One of the regional centers is Blagoevgrad. The region borders Kyustendil Province and Sofia Province to the north, Pazardzhik Province and Smolyan Province to the east, Greece to the south, and North Macedonia to the west. The population is estimated around 290,000 people.