Internal migration is an important factor which effects social and economic development especially in developing countries. The study of different trends of migration in different parts of the country helps in understanding the dynamics of the society. Based on the data from census 2001, this paper presents different trends of internal migration in India – Within states and also between different states. From the data it is observed that the majority of internal migration in India tales place from rural to urban areas. The main reason for migration among males is lack of proper employment in rural areas which makes people to migrate to urban areas for better employment. While in case of females the reason for majority of them is marriage. Migration has both positive as well as negative effects on the areas to which people migrate and from where people migrate. The consequences or effects of migration are given in social, economic, environmental and demographic terms.