The Union Pacific West Line (UP-W) is a commuter rail line operated by Metra in the Chicago metropolitan area. The line runs from the Ogilvie Transportation Center in downtown Chicago to Elburn, Illinois. Until its extension in 2006, the UP-W terminated in Geneva, Illinois. Since May 2025, the service is operated directly by Metra. Previously, it was operated by the Union Pacific Railroad (UP) under a purchase-of-service agreement. UP continues to own the tracks and manage dispatching as part of its Geneva Subdivision.