This paper examines the factors of rural-urban migration in Bangladesh. It is found that the underlying cause of migration is mainly driven by economic and social factors ie, unemployment, poverty, political and ethnic conflicts, religious etc. In the migration process the push factors are more active then pull factors, as poverty and unemployment always push the poor villagers to change their residence to the cities. After migration majority of the migrants comparatively improved their livelihoods in the city. Although poor migrants have contributed significantly to the economic growth and gained from higher wages in higher productivity areas, they remain socially and economically excluded from the wider benefits of economic growth such as access to food and education, housing, sanitation and freedom. The study results highlight the need to target migrant groups and urban poor within urban areas in the provision of availability of work and social care services.