Cachoeira do Arari is a Brazilian municipality located in the state of Pará.

The area of the municipality is 3,102.080 km².

The city belongs to the mesoregion Marajó and to the microregion of Arari.

The municipality is contained in the 59,985 square kilometres (23,160 sq mi) Marajó Archipelago Environmental Protection Area, a sustainable use conservation unit established in 1989 to protect the environment of the delta region.

[2] This Pará, Brazil location article is a stub.