|Country||Bosnia and Herzegovina|
|Entity||Federation of Bosnia and Herzegovina|
|• Total||3.32 sq mi (8.59 km2)|
|• Density||33/sq mi (13/km2)|
|Time zone||UTC+1 (CET)|
|• Summer (DST)||UTC+2 (CEST)|
Obljaj (Serbian Cyrillic: Обљај) is a village near Bosansko Grahovo in Bosnia and Herzegovina. Obljaj is located north of Livno near the border with Croatia. It is in the northwest corner of Bosnia and Herzegovina. It is administratively part of Canton 10 of the Federation. It is difficult to reach except by small roads.
Gavrilo Princip, whose assassination of Archduke Franz Ferdinand of Austria started World War I, was born here in 1894 and lived here when he was young. His father was a postman in the village. The village was also a Serb community.
According to the 2013 census, its population was 108.
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