Kosundi Union (Bengali: কছুন্দী ইউনিয়ন) is a union parishad situated at Magura Sadar Upazila, in Magura District, Khulna Division of Bangladesh.
[1] The union has an area of 17.40 square kilometres (6.72 sq mi) and as of 2001 had a population of 10,551.
[2] There are 10 villages and 6 mouzas in the union.