| Frederico Westphalen | |
| Subdivision Type: | Country |
| Subdivision Name: | Brazil |
| Subdivision Type1: | State |
| Subdivision Type2: | Mesoregion |
| Subdivision Name1: | Rio Grande do Sul |
| Subdivision Name2: | Noroeste Rio-Grandense |
| Parts Type: | Municipalities |
| Parts Style: | para |
| P1: | 27 |
| Area Total Km2: | 5,182.529 |
| Population Total: | 175,391 |
| Population As Of: | 2005 |
| Population Density Km2: | auto |
| Type: | Microregion |
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.[1] 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" .[2]