Imperatriz is the second most populated city in the northeastern Brazilian state of Maranhão. The city extends along the right bank of the Tocantins River and is crossed by the Belém-Brasília Highway, standing on the border with the state of Tocantins.

Maranhão is a state in Brazil. Located in the country's Northeast Region, it has a population of about 7 million and an area of 332,000 km2 (128,000 sq mi). 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.