Babulu is the southernmost district of Penajam North Paser Regency, in East Kalimantan, Indonesia.

As of 2023, it was inhabited by 39,921 people, and currently has the total area of 522.75 km2.

Its district seat is located at the village of Babulu Darat.

[1] The district borders Waru to the north and Long Kali (Paser) to the southwest.

Babulu is divided into the following 12 villages (desa):[3]