Abstract: For centuries, the mining industry has been contributing to the development of nations, a vibrant mining sector like any other sector provides good platform for a country’s growth. Quarrying, a branch of mining is one of the bedrock of the construction sector in any economy. This study examines the economic contribution of granite quarrying in Oyo State, South-Western Nigeria. Fourteen granite quarrying companies exist in the state, out of which twelve are operational. The twelve quarries were visited in the course of this study and relevant data were gathered from them. All the companies share a total of 220.7x10⁶ tons of proven granite reserve. Estimated revenue generated by the federal government is 500,000 day^-1. A total of 845 people are directly employed by the quarries, while 1018 people are employed indirectly in the company’s community. The study also revealed a substantial increase in the level of income of the indirect employees after relocating to their businesses to the company’s community. It was equally discovered that 80% of the granite produced in the state is sold and used in Lagos state (a neighbouring state). Granite quarrying in Oyo state is very profitable and rewarding for investors but government should improve power supply to encourage investors and reduce the cost of operating the quarries.