About four-fifths of the area of Jahrom County is mountainous and the rest is consist of plains. The heights are parts of Zagros Mountains. The average height of the city is about , the highest point of the county is the Sepidar peak between Khafr county and Simkan district which is about , and the lowest point is about in Simkan district. Qare Aghaj, Shoor and Simakan are among the rivers of Jahrom County. Salman Farsi Dam is located west of Jahrom.