Seoul City Route 21 (Trunk)

Seoul Special Metropolitan City Route 21 shield}}
Seoul Special Metropolitan City Route 21
서울특별시도 제21호선
Siheung - Jungnim Line
Route information
Length17.7 km (11.0 mi)
Major junctions
FromGeumcheon District, Seoul
ToJung District, Seoul
Location
CountrySouth Korea
Highway system

Seoul Metropolitan City Route 21 (Korean서울특별시도 제21호선) is a road located in Seoul, South Korea. With a total length of 17.7 km (11.0 mi), this road starts from the Siheung-dong in Geumcheon District, Seoul to Jungnim-dong in Jung District.