Rashtrakuta dynasty
Boisar was part of the Rashtrakuta dynasty which had ruled the Deccan plateau between the 8th and 10th centuries. It was ruled by Ahmadnagar (1521–1594), the Portuguese Empire (1594), the Maratha Empire (1739–1818), the East India Company (1818–1857) and the British Raj (1857–1947). There are some forts near the city, such as Asava Fort (11 km), Tarapur Fort (), Kaldurg Fort(), Shirgaon Fort (), Mahim Fort (), and Asheri Fort ().