The Sillim Line () is a rubber-tyred light metro which is part of the Seoul Metropolitan Subway. It opened on May 24, 2022.
All stations are in Seoul.
A northern extension towards Dongyeouido (station name is not determined yet) is currently being considered to provide transfers to Seobu Line.
A five-station branch line from Boramae Park is also currently being considered. Citizens of Geumcheon District have lobbied for a further extension of the branch to Geumcheon-gu Office station. The proposed stations are listed below.
All stations are in Seoul.
A two-station southern extension of the line into the Seoul National University campus was considered but ultimately cancelled.