ONGOL, a town of British India, in the district of Nellore, presidency of Madras, 189 miles N. of Madras; N. Lat. 15. 30., E. Long. 80. 6. It is large, but consists for the most part of wretched mud hovels, covered with thatch; and has a ruinous fort. The scenery in the vicinity is picturesque; and the country, though not fertile, is rich in copper ore. Pop. of the town and district annexed to it, 31,666.