Gusau is a city and Local Government Area located in northwestern Nigeria. It is the capital of Zamfara State.
The LGA has an area of 3,364 km² and a population of 383,162 at the 2006 census.
The postal code of the area is 880.
Gusau sits just north of a line drawn from Kebbe to Kano, and has an estimated population of 147,404.
Its population is mostly Hausa with some Fulani, Yoruba, Igbo etc.
Sharia practice was first declared in the city in 1999 by the governor Ahmed Sani (Yariman Bakura) and is still in force.