Maranhão (maɾɐˈɲɐ̃w) is a state in Brazil. Located in the country's Northeast Region, it has a population of about 7 million and an area of . Clockwise from north, it borders on the Atlantic Ocean for 2,243 km and the states of Piauí, Tocantins and Pará. The people of Maranhão have a distinctive accent within the common Northeastern Brazilian dialect. Maranhão is described in literary works such as Exile Song by Gonçalves Dias and Casa de Pensão by Aluísio Azevedo.
The dunes of Lençóis are an important area of environmental preservation. Also of interest is the state capital of São Luís, designated a Unesco World Heritage Site. Another important conservation area is the Parnaíba River delta, between the states of Maranhão and Piauí, with its lagoons, desert dunes and deserted beaches or islands, such as Caju island, which shelters rare birds.
The northern portion of the state is a heavily forested plain traversed by numerous rivers, occupied by the eastern extension of the tropical moist forests of Amazonia. The Tocantins–Araguaia–Maranhão moist forests occupy the northwestern portion of the state, extending from the Pindaré River west into neighboring Pará state. The north-central and northeastern portion of the state, extending eastward into northern Piauí, is home to the Maranhão Babaçu forests, a degraded tropical moist forest ecoregion dominated by the Babaçu palm. Much of the forest has been cleared for cattle grazing and agriculture, and the Babaçu palm produces edible oil which is extracted commercially.
The southern portion of the state belong to the lower terraces of the great Brazilian Highlands, occupied by the Cerrado savannas. Several plateau escarpments, including the Chapada das Mangabeiras, Serra do Tiracambu, and Serra das Alpercatas, mark the state's northern margin and the outlines of river valleys.
The climate is hot, and the year is divided into a wet and dry season. Extreme humidity characterizes the wet season. The heat, however, is greatly modified on the coast by the south-east trade winds.