The present paper tries to understand the pattern and trend of female migration to six mega cities of India namely Mumbai, Delhi, Kolkata, Chennai, Hyderabad and Bangalore having more than five million population each. The study uses the census data at two periods of time,namely, 1991 and 2001. It is found that most of the migrants to these six cities originate from relatively backward states of India. Marriage is still the most important factor of female migration in India, but, its importance as a cause of female migration has declined over the time. On the other hand, it is quite encouraging to find that the proportion of females migrating for work, employment and education is increasing over the period of time. The volume of female migration to all the six mega cities has also increased over the period of time.