Good part of ribeirense population lives in next economic conditions the poverty. The illiteracy tax is sufficiently significant what it places the city with one of the lowest IDH (Index of Human Development) of Brazil. As for the population contingent, in middle of the decade of 50, the IBGE, the population of 450 inhabitants for Brook of the Plaza registered. Already in 1996, after the emancipation, presented a population contingent of 13.786 inhabitants, having grown to a tax of 0,76 AA., in its first tax period 1991/1996. Currently, it is an eminently agricultural city, with only 25% of its population living in the municipal headquarters and the district of New Brasilia. Em1996, demographic adensidade of the city is of 11hab/km, given still inferior to the state and regional standards.
However, it is considered of great contribution for the growth of the tax of urbanization to the coming of people of other cities, these the search of new jobs is for the harvest of public coffee in the farms of the region, competitions, rendering of services ou/e job contracts. The etria structure of the population of the city presented a profile of a young population which had the biggest relative weight of the band de0 a19 years. As for the distribution of the population for sex, the demographic data of 2009 identified by the IBGE indicate a sensible predominance of the men in the city: 54.77%. However, it had a fall of the number of inhabitants, in accordance with the demographic census of 2010, Brook of the Plaza is a population of with 8.602 inhabitants in a territorial area (km ) of 1.271, 344 with demographic density (hab/Km ) 6,77. () Given of 1991 they show that 95.54% of the PEA of the city if concentrated in on activities to the farming one, to the vegetal extension and to it fishes.