Solapur (sō´ləpŏŏr, sōləpŏŏr´), city (1991 pop. 620,846), Maharashtra state, W central India, on the Deccan plateau. Once a fortress town, Solapur is now a district administrative center, a great textile-manufacturing city, and a market for oilseeds and tobacco. It passed to the Mughals in 1668, to Hyderabad in 1723, to the Marathas in 1795, and to the British in 1818. A 14th-century Muslim fort is in the city.