According to data of the IBGE (STATES & CITIES, 1978), the population of the city of Stream of Santana enters the decades of 1950 and 1970, passed for a process of 38,47% growth, since in the decade of 1950, the population of this city was around 21.301 and arrives the 29,496 distributed inhabitants in 1970 in 3.873 a territorial extension of Km2. These data make possible estimates of the Center of Research and Estudos (CPE), in 1978 for occasion of the centenarian of emancipation politics of the city, of that the population would have reached of 32.639. However, what it is observed, as given of the Center of Statisticians and Informaes (CEI), she is that it had a stagnation during the decade of 1970, when the population only arrives the 29,719 inhabitants in 1980, presenting a growth of little more than 200 inhabitants in relation to the reached number ten years behind. As all the Northeast region of the country, the city suffered a long period from emigration for the states of the Southeastern South and of the country, for where the people if dislocated to the search of job and better conditions of life. This process of agricultural exodus if strong discloses more in the population dynamics of the city from the decade of 1970, when it is initiated already mentioned crisis of the culture of the cotton. In this period the vegetative growth, badly obtains to on account surpass the losses of population of the emigration. During the decade of 1980 the total population of the city it arrives to suffer a considerable reduction in absolute numbers, falling of the 29,719 inhabitants in 1980 for 23.578 inhabitants in 1990. It can have intervened with this process, the territorial reduction that Stream of Santana suffered in 1989 with the dismemberment from ' ' distrito' ' of Matina. However, the CEI considers the intense migratory process as the main factor that contributed for this decrease.