The municipality is located in northern Montenegro.

[1] Petnjica Municipality is divided into 7 local communities (Montenegrin Latin: mjesne zajednice, singular: mjesna zajednica) with 25 settlements (naselja, singular: naselje).

[2] The local communities are: Bor (Bor and Ponor), Petnjica (Petnjica, Godočelje, Johovica, Lagatori, Lazi, Pahulj and Radmanci), Savin Bor (Savin Bor, Dašča Rijeka, Dobrodole and Kruščica), Javorova (Javorova, Murovac and Poroče), Trpezi (Trpezi and Kalica), Tucanje (Tucanje, Azane, Lješnica, Orahovo and Vrševo) and Vrbica (Upper Vrbica and Lower Vrbica).

The ethnic groups in the Petnjica Municipality, according to the 2023 census:

This Montenegro location article is a stub.