 The area around the district office was made the new Sub-district Lam Narai in 1970.Neighboring districts are (from the east clockwise) Lam Sonthi, Tha Luang, Phatthana Nikhom, Khok Samrong and Khok Charoen of Lopburi Province, and Si Thep of Phetchabun Province.The Wang Kan Luang waterfall is the most visited place by Lopburi visitors.