Migration has always resulted in demographic consequences since it is the people who move from one region to another and change the demographic structure of both the place of origin and the destination.  In Ernakulam the rural-urban migration had a remarkable impact on the growth of population, sex ratio, age-sex pyramid, occupational structure, fertility and mortality of the people.  As an aftereffect of such a trend, when considering the proliferation of Apartments Ernakulam is leading other districts in Kerala.
 
As migration is considered as a third factor in population growth, rural-urban migration played a major role in urban growth.  Population composition has also been remarkably affected since most of the migrants are younger males.  This has led to reduced sex ratio, affected the age-sex pyramid and also had a considerable impact on the occupational structure. 
 
About 80 percent of the population is engaged in tertiary activities in Ernakulam.  However, a vast chunk of the population engaged in tertiary activities does not imply higher rate of urbanization.  A majority of the population considered as tertiary workers are either petty shop owners or underemployed youths or construction workers.  In the absence of any major industry or job opportunity, urban growth in Ernakulam does not commensurate with urbanization in the true sense. 
 
Irregularity in the payment of salary, closure of many industrial units etc has resulted in poverty, low purchasing power and further reduction in consumer and industrial products.  Thus, even though the absence of rural employment and higher education opportunities is a major problem, people of nearby villages have migrated to Ernakulam in search of a better life.  Thus this district is now unable to meet their various needs and aspirations and the number of urban poor has increased considerably.  Even then, the overall contribution of the rural-urban migration towards urban development in Ernakulam district cannot be ignored.