Lanja is a census town in Ratnagiri district in the Western Indian state of Maharashtra. About 50 km from the district headquarters Lanja is well known for its climatic variability as it has ample rains as well as good enough winters followed by heating summers. Lanja is also well known for cashew nut processing as a number of small as well as medium scale processing factories are located in and nearby the town. Also, Ratnagiri Alphonso, which is famous for its taste all over the world is produced in certain nearby villages in Lanja tahsil.
The temperatures are often below 10 degrees Celsius in winters. In summer they jump up to 40 degrees Celsius.
From the time of the Peshva up to 1 August 1879, when Vengurle was made a sub-division, Lanja was the headquarters of a petty division of Rajapur. In the village is the grave of a Muhammedan saint named Syed Chand Bukhari Ali Faqir, said to have lived about five hundred years ago. Yearly at the Magh (January–February) full moon a Urus is held, when the tomb is, with ceremonies and prayers, covered with a cloth and sprinkled with powdered sandalwood. The fair is still largely attended (1960), by people of different communities from Lanja and the neighboring villages.