(i) Bombay became the capital city of the Bombay presidency in 1819, hence more people began to settle in Bombay.
(ii) Growth of trade in cotton and opium led large communities of traders, bankers, artisans and shopkeepers to settle in Bombay.
(iii) In 1854, cotton mills were established in Bombay. Most of the workers came from outside.
(iv) Large number of people came to work at the seaport and the railways which encouraged migration.
(v) Famines in dry regions brought more people to Bombay. Bombay attracted many people to work in films too.