Blatska is a village in Hadzhidimovo Municipality, in Blagoevgrad Province, Bulgaria.

[1] It is situated in the valley of the Mesta river, close to the border with Greece.

There is an ancient and medieval fortress named "Hysar" 1 km (0.62 mi) east of the center of the village.

In the book "Ethnography of the Adrianopol, Monastir and Salonika vilayets", published in Istanbul in 1878, presenting the statistics of the male population in 1873, the village is mentioned as one with 40 households and 100 Muslim people.

Blatska is situated just 2 km (1.2 mi) north of the municipal center Hadzhidimovo and is connected with it by bus.