The Melecha (Russian: Мелеча) is a river in Sandovsky, Molokovsky, and Bezhetsky Districts of Tver Oblast in Russia. Together with the Mogocha River, it forms the Osen, a major right tributary of the Mologa River. It is 95 kilometres (59 mi) long, and the area of its basin is 1,310 square kilometres (510 sq mi). The principal tributary is the Belaya River (left).