Marechal Thaumaturgo () is a municipality located in the west of the Brazilian state of Acre. Its population is 19,299 and its area is 7,744 km<sup>2</sup>.
The municipality contains 5% of the Serra do Divisor National Park, created in 1989.
It contains most of the Alto Juruá Extractive Reserve, created in 1990, and 5% of the Alto Tarauacá Extractive Reserve, created in 2000.