Vallès Occidental
| Vallès Occidental | |
|---|---|
| Country | Spain | 
| Autonomous community | Catalonia | 
| Province | Barcelona | 
| Region | Àmbit metropolità de Barcelona | 
| Capital | Sabadell and Terrassa | 
| Municipalities | List 
 | 
| Government | |
| • Body | Vallès Occidental Comarcal Council | 
| • President | Xavier Garcés (PSC) (2024–present) | 
| Area | |
|  • Total | 583.1 km2 (225.1 sq mi) | 
| Population  (2014) | |
|  • Total | 899,532 | 
| • Density | 1,500/km2 (4,000/sq mi) | 
| Demonym | |
| Time zone | UTC+1 (CET) | 
| • Summer (DST) | UTC+2 (CEST) | 
| Largest municipality | Terrassa | 
| Website | www.ccvoc.cat | 
Vallès Occidental (Catalan pronunciation: [bəˈʎɛz uksiðənˈtal]) is a comarca (county) in the Barcelona region in Catalonia (Spain). It has two capitals, Sabadell and Terrassa. Along with Vallès Oriental, it forms the historical Vallès region.