Salsette Island is an island in Konkan division of the state of Maharashtra, along India's west coast. Administratively known as the Mumbai Suburban district, Mira Bhayander and a portion of Thana lie on it; making it very populous and one of the most densely populated islands in the world. It has a population of more than 20 million inhabitants living on an are…Salsette Island is an island in Konkan division of the state of Maharashtra, along India's west coast. Administratively known as the Mumbai Suburban district, Mira Bhayander and a portion of Thana lie on it; making it very populous and one of the most densely populated islands in the world. It has a population of more than 20 million inhabitants living on an area of about 619 square kilometres.