[1] The district borders Sepaku to the north, Waru to the southwest, and Long Kali, Paser to the west.

"opposite of Balikpapan") before 13 October 1987, when it was transferred again to Pasir Regency by government regulation number 21, and the name change was reverted.

[4] On 11 June 1996, the northern parts of the district (12 villages) were separated to form Sepaku.

[5] Penajam has a tropical rainforest climate (Af) with heavy rainfall year-round.

Penajam is divided into the following 23 villages (the rest are urban kelurahan, rural desa are marked by grey background):[1]