y; other important cities in the state include Ijebu Ode, the former royal capital of the Ijebu Kingdom, and Sagamu, Nigeria's leading kola nut grower. Ogun state is covered predominantly by rain forest and has wooden savanna in the northwest . Ogun State had a total population of 3,751,140 residents as of 2006, making Ogun State the 16th most populated state in Nigeria In terms of landmass, Ogun State is the 24th largest State in Nigeria with land area of 16,762 kilometer square.