Tirah, also spelled Terah, also called the Tirah Valley, is a mountainous tract located in the Orakzai District and the southern part of the Khyber District, lying between the Khyber Pass and the Khanki Valley in Pakistan.

Orakzai District is a district in the Kohat Division of the Khyber Pakhtunkhwa province of Pakistan. Before 1973, it was part of FR Kohat. Up until 2018, it was an agency within the erstwhile Federally Administered Tribal Areas. However, with the merger of the FATA with Khyber Pakhtunkhwa, it attained the status of a district.