Abstract: The study specifically aims to review cause and consequences of rural- urban migration in Ethiopia. Environmental degradation, lower agricultural productivity, inadequate social services, demographic pressure, land shortages in rural areas were identified as the major push factors of migration. Although “push” factors predominate, there are some significant “pull” factors that attract rural people to urban areas such as education, health services, security, better job, advancement opportunities and other urban amenities. Depending on reviewed document, the most significant consequences of migration in the urban areas are overcrowding and congestion, strain on urban social services rising food costs, worsening air and water quality and increasing violence, prostitution and diseases are important.