Microregion of Frederico Westphalen
The Microregion of Frederico Westphalen () was one of the Microregions of the Rio Grande do Sul state, in Brazil. It belonged to the mesoregion of the Noroeste Rio-Grandense. Its population was estimated by the IBGE to be of 175,391 in 2005, divided in 27 municipalities. Its total area is 5,182.529 km². The IBGE has since discontinued the microregion system for population tracking, replacing it with the term "immediate geographic region" ().