The Mico Leão Preto Ecological Station is an Ecological station in the state of São Paulo, Brazil. It protects four fragments of Atlantic Forest in a region that has lost most of its forest coverage over the last century, and protects the endemic endangered black lion tamarin, which gives the reserve its name.

An ecological station in Brazil is a type of protected area of Brazil as defined by the National System of Conservation Units (SNUC). The purpose is to preserve untouched representative samples of the different biomes in Brazil.