sentences:  A large part of the district is part of the Huai Kha Khaeng Wildlife Sanctuary.Neighboring districts are (from the north clockwise) Mae Poen of Nakhon Sawan Province; Lan Sak, Huai Khot, and Nong Chang of Uthai Thani Province; Nong Mamong, Hankha, and Noen Kham of Chai Nat Province; Dan Chang of Suphan Buri Province; Si Sawat and Thong Pha Phum of Kanchanaburi Province; and Umphang of Tak Province.The district is divided into 13 sub-districts ("tambons"), which are further subdivided into 134 villages ("mubans").