It is the only municipality in the west boundaries of Amapá, except for a small part of Vitória do Jari.

In 1948, his tenants revolted and he was forced to sell the land to Portuguese businessmen who sold it to Daniel K. Ludwig, an American billionaire,[3] in 1964.

[3] The city is still mainly a river slum, and suffers from fires, floods, and open sewage.

[9] The municipality contains 39% of the 501,771 hectares (1,239,900 acres) Rio Cajari Extractive Reserve, created in 1990.

[13] The area inside Laranjal do Jari measures 3,592 square kilometres (1,387 sq mi).