This paper reviews the state of urban slums in Nigeria and attempts to explicate the issues that arise from the approach of slum eradication in some selected cities (Lagos, Port Harcourt, Abuja and Jos). A wide range of secondary source material was collected and analysed thematically. The analysis affirms that the slumming process in the four cities is significantly accounted for, by rising urbanisation. In Lagos and Port Harcourt cities the urbanisation appears to be linked to the industrialisation process but this is not the case in Abuja and Jos. However, some factors were found to be common in the slumming process of the four cities such as: One, the rising population which is increasing the demand for urban services. Two, there is acute shortage in the supply of adequate housing for the low-come and poor households. Lastly, there is inadequate arrangement for the effective management of urban growth and expansion. Other issues identified are: the absence of mechanisms for the prevention of slum formation; a preference for the demolition of slums by authorities as opposed to their improvement; a wide practice of implementing eviction on short notice; and in most instances, government authorities have failed to provide adequate alternative shelter to evicted households. These findings clearly indicate that the subsisting housing and urban development policies leave gaps for such flawed practices. Accordingly, policy recommendations and suggestions for empirical study are made.