Ajaokuta Steel Company Limited (ASCL) popularly known as Ajaokuta Steel Mill is a steel mill in Nigeria, located in Ajaokuta, Kogi State, Nigeria. Built on a 24,000 hectares (59,000 acres) site starting in 1979, it is the largest steel mill in Nigeria, and the coke oven and by-products plant are larger than all the refineries in Nigeria combined. However, the project was mismanaged and remains incomplete 40 years later. Three-quarters of the complex have been abandoned, and only the light mills have been put into operation for small-scale fabrication and the production of iron rods.

Ajaokuta is a Local Government Area in Kogi State, Nigeria and a town within it on the left bank of the Niger River. The headquarters of the LGA are in the town of Egayin in the south of the area at 6°40′11″N 8°48′19″E.