Rio Envira is a river in Acre state in Brazil. The Rio Jaminauá is one of its tributaries. It is a tributary of the Tarauacá River.

The river defines the northwest boundary of the 231,555 hectares (572,180 acres) Santa Rosa do Purus National Forest, a sustainable use conservation unit created in 2001. It flows in a north of northeast direction from the park, passing under the BR-364 highway and flowing north into Amazonas state, where it joins the Tarauacá just south of the settlement of Envira.

• List of rivers of Acre