The Boian culture arose on the Wallachian Plain, north of the Danube River in southeastern Romania.

It expanded, encompassing settlements in the Bărăgan Plain, Danube Delta, Dobruja, and Danubian Plain in Romania, northeastern Bulgaria, and the Balkan Mountains.

h of the Danube River.

Its reach extended westward to the Jiu River, bordering Transylvania, northward to the Chilia branch of the Danube Delta and the Black Sea coast, and southward to the Rhodope Mountains and Aegean Sea in Greece.

The Boian culture's core site lies on Lake Boian's island in Muntenia, on the Wallachian Plain nort