Deroli Ahir is a village in Narnaul tehsil in district of Mahendragarh, Haryana, India. As per the data provided by Census of India in 2011, total population of Deroli Ahir was 4,087 which includes 2,144 males and 1,943 females. Deroli Ahir covers 962 ha area. Pincode of Deroli Ahir is 123028.