Ratnāgiri is a port city on the Arabian Sea coast in Ratnagiri District in the southwestern part of Maharashtra, India. The district is a part of Konkan division of Maharashtra.
The Sahyadri mountains border Ratnagiri to the east. Heavy rainfall results in highly eroded landscape in the coastal region, but fertile alluvial valleys in the region produce abundant rice, coconuts, cashew nuts, and fruits, "Hāpus" (Alphonso) mangoes being one of the main fruits. Fishing is an important industry in Ratnagiri.