Onitsha City Marathon (OCM) is an initiative developed to discover and harness sporting talents of the teeming youths of Onitsha, Anambra State, Nigeria and Africa at large and to showcase Onitsha City on the global map as a centre of sporting excellence.

Onitsha is a city located on the eastern bank of the Niger River, in Nigeria’s Anambra State. A metropolitan city, Onitsha is known for its river port and as an economic hub for commerce, industry, and education. It hosts the Onitsha Main Market, the largest market in West Africa in terms of geographical size and volume of goods. The indigenous people of Onitsha are Igbo and speak the Igbo language. The Onitsha people are referred to as Ndi Onicha.