* Croatia: This is where Glagolitic originated, and it remained the dominant script for centuries.
* Bulgaria: The Glagolitic alphabet was adopted by some communities in Bulgaria, especially during the First Bulgarian Empire and the Middle Ages.
* Serbia: Glagolitic was used in Serbia, particularly during the early medieval period.
* Bosnia and Herzegovina: Glagolitic had some presence in Bosnia and Herzegovina, especially among the Bosnian Church.
* Dalmatia: Glagolitic was used in the region of Dalmatia, which is currently part of Croatia.
* Macedonia: Glagolitic was also used in some areas of Macedonia, but to a lesser extent than in other regions.
It's important to note that the use of Glagolitic varied across these regions, and it was not the only script used in these countries. The Cyrillic alphabet eventually became the dominant script in most of these areas. Today, Glagolitic is primarily used in religious contexts and as a symbol of cultural heritage in Croatia.