Sillim or Sillim-dong is a statutory division of Gwanak District, Seoul, South Korea. Seoul National University and Nokdu Street is located in the town. Its name means "new forest", which was derived from the woods outstretched from Mt. Gwanak. It consists 11 administrative neighbourhoods.
In a survey conducted in 2011 by the Ministry of Land, Transport and Maritime Affairs on 92 Administrative divisions across the country, it reported that the bus stops in Sillim-dong is among the busiest in the country.
As of September, 2008, there are 11 administrative neighborhoods (dong) in Sillim.