JACOBABAD, a town of British India, the administrative headquarters of the Upper Sind frontier district in Bombay; with a station on the Quetta branch of the North-Western railway, 37 m. from the junction at Ruk, on the main line. Pop. (1901), 10,787. It is famous as having consistently the highest temperature in India. During the month of June the thermometer ranges between 120° and 127° F. The town was founded on the site of the village of Khangarh in 1847 by General John Jacob, for many years commandant of the Sind Horse, who died here in 1858. It has cantonments for a cavalry regiment, with accommodation for caravans from Central Asia. It is watered by two canals. An annual horse show is held in January.