Chiojdu is a commune located in the northwestern hill and mountainside region of Muntenia, Romania. It is situated within Buzău County and serves as a local administrative center for its surrounding area.
The commune is composed of six villages situated along the banks of the Bâsca Chiojdului river, which is a small tributary of the Buzău River. The region is notably recognized for the preservation of old traditions and folk art, particularly regarding the specific architectural style of its traditional houses.