The Paraíba Valley (Portuguese: Vale do Paraíba) is a microregião of the eastern part of the state of São Paulo. It is located within rodovia Presidente Dutra (BR-101), between Rio De Janeiro and São Paulo, inside of this megalopolis formes two capitals.

The region forms the hydrographical basin of rio Paraíba do Sul , that it flowes empty to Rio De Janeiro.

This region includes the highly developed industrial park and the space station. Its cities of the valley are São José dos Campos, Jacareí, Taubaté, Lorena, Pindamonhangaba, Cruzeiro and Guaratinguetá.