Seoul Subway Line 2

The line connects the city centre to Gangnam, Teheran Valley and the COEX/KWTC complex.

In December 2010 the line is recorded as having the highest WiFi data consumption in the Seoul Metropolitan area.

[6] In 2011, retailer Homeplus opened the world's first virtual supermarket at Seolleung station, where smartphone users can photograph the bar code of life-size pictures, on the walls and platform screen doors, of 500 items of food, toiletries, electronics etc., for delivery within the same day.

There is a possible extension currently in the conception stage to extend the Sinjeong Branch to 3.7 km to Gayang Station on Line 9.

As of February 2025, only third, fourth and fifth batch 2000 series trains are in operation (manufactured by Hyundai Rotem and Dawonsys respectively), since all first (MELCO thyristor chopper control) and second batch (GEC Traction/Alstom thyristor chopper control) trains have been retired between 2008 and 2023.

Former split-flap display passenger information system signs used on Seoul Subway Line 2 from 1980 until replaced with flat-screen TV displays in 2005–10.
Commemorative ticket issued for the opening of the second phase of Seoul Subway Line 2 on December 23, 1982.
Fragment of an early-1980s Seoul Subway map, showing the western two-thirds of the Line 2 loop as a green line.
Second-generation Seoul Metro 2000 series VVVF -inverter train (third batch) crossing the Dangsan Railway Bridge on the Han River in October 2022.