This chapter explores the history of urbanization in Nigeria, focusing primarily on the colonial era and, to a lesser degree, precolonial Nigeria in areas that hosted large, Indigenous urban centers like Ibadan or Kano. This chapter will argue that the primary factor that pushed Nigeria toward urbanization was colonialism, driven primarily by economic interests. This development was informed by Nigeria’s unique geographic, social, and political conditions, the specifics of which will be showcased through the exploration of Nigeria’s most prominent cities. Finally, the chapter will detail the urban policies of colonial officials and the actual development of these cities, along with the challenges that arose from uneven, exploitative practices. These issues would mire Nigeria’s urban landscape with poor planning, crime, poverty, and numerous other challenges which continue to plague the nation today.