Ukum is a Local Government Area of Benue State, Nigeria. It has an area of 1,514 square kilometres (585 sq mi) and a population of 216,930 at the 2006 census. The biggest yam market in the world, Zaki Biam Yam Market, is located in Ukum. Zaki Biam is also the biggest town in Ukum local government.The postal code of the area is 980.