Soma is a municipality and district of Manisa Province, Turkey. Its area is 820 km, and its population is 111,789. The town lies at an elevation o…Soma is a municipality and district of Manisa Province, Turkey. Its area is 820 km, and its population is 111,789. The town lies at an elevation of 161 m. From 1867 until 1922, Soma was part of the Aidin Vilayet of the Ottoman Empire.