This chapter explores the trends and patterns of international and internal migration with respect to India, including their underlying causes and socio-economic consequences, using secondary data compiled from various sources such as the United Nations Global Migration Database (UNGMD) and the National Sample Survey (NSS) of India. The chapter explores the nature, growth and composition of international and internal migration and the consequent implications in terms of growth, remittances, urbanisation and so on. Following an introductory section, the chapter explains the trends and patterns of international migration – its underlying reasons. It also provides details of remittances and their role on poverty, economic growth and overall socio-economic development in India. It then explores the trends and patterns of internal migration, and its causes and consequences on urbanisation in India, before providing concluding remarks.