Koksar is one of the villages in Lahaul Mandal in Lahaulspiti District in Himachal Pradesh state in Northern India. Koksar meaning is Alpine, Big, Colossal, Gigantic, Highland, Huge, Mammoth, Tall and Towering. Koksar is about 19 km from Rohtang Pass, and 7 km from North Portal of Atal Tunnel Rohtang. Koksar is the coldest place in Lahaul. It is mostly snowed-in during winters but during the summer months, the PWD Rest House and Eating places are in business. It is a mountainous area from which views and pathways for hiking can be seen. It is 340 km from its state capital Shimla and 70 km from Manali. Nearby villages are Tailing (7.0 km) and Sissu (13.0 km). Koksar Pin Code is 175140 and the Post office name is Koksar. STD code of Koksar is +91-1900. Reliance Jio has started its 4G services in the valley starting 2019. Earlier BSNL Mobile Network was the only working network in the valley. Nearest petrol pump is at Tandi (40 km from Koksar) which is a sole filling station in the entire valley.