Bannu Division is one of seven divisions in Pakistan's Khyber Pakhtunkhwa province. It consists of three districts: Bannu, Lakki Marwat, and North Waziristan. According to the 2017 Pakistani Census, the division had a population of 2,656,801, making it the least populous division in the province, but it spans 9,975 km2 (3,851 sq mi) of area, and this makes it the third-smallest division by area in the province. Lakki Marwat is the largest city of Bannu Division, with around 60,000 people, while the division's namesake and second-largest city is Bannu, with just under 50,000 people. The division borders Dera Ismail Khan Division to the south and west, Kohat Division to the north and east, and the province of Punjab, Pakistan to its east. CNIC code of Bannu Division is 11.

The four provinces, capital territory, and two autonomous territories of Pakistan are subdivided into 39 administrative "divisions", which are further subdivided into districts, tehsils, and finally union councils. These divisions were abolished in 2000, but restored in 2008.