This study investigated the problem of urbanization and urban unemployment in Nigeria and how it affects the sustainability of Nigeria economy. The data for the study were collected from the Central Bank of Nigeria Statistical bulletin and National Bureau of Statistics. The study shows that urbanization and urban unemployment affect the economic sustainability of Nigeria. Descriptive statistical method was used to reach this finding. The Harris-Todaro model of migration and unemployment was employed to prove the argument. Hence, the paper recommends some possible means that are open to attain sustainable development in Nigeria, especially with regard to the decline of the problem of urbanization and urban unemployment, which is a big problem facing the country at the present moment.
Keywords: Sustainable Development, Urbanization and Urban Unemployment