Sindhudurg is an administrative district in the state of Maharashtra in India, which was carved out of the erstwhile Ratnagiri District. The district headquarters are located at Oros (ओरस). The district occupies an area of 5207 km² and has a population of 868,825 of which 9.47% were urban (as of 2001).As of 2011 it is the least populous district of Maharashtra (out of 39).