Ballanjui Falls (also spelled Ballunjui Falls) is one of the tallest waterfalls in Lamington National Park, Queensland, where Nixon Creek drops over a series of cliffs on Yugambeh Country.

The falls consist of three tiers with a combined drop of approximately 190 metres. The two lower tiers — Ballanjui and Yabbraboola Falls — are visible from the base and together fall around 108 metres, while the lowest cascade is only about eight metres high.

The uppermost tier, Booboora Falls, is not visible from below. The name Ballanjui derives from the Yugambeh word for "easterly."

Access to the base is via a side track off the Ships Stern Circuit near Binna Burra, and the Charraboomba Rock lookout offers an elevated view down into the Nixon Valley.

After recent rain the falls run at their most impressive, though the surrounding rainforest of picabeen palms, brush boxes, and flooded gums makes the area rewarding to visit in any conditions.