Jamsil Indoor Gymnasium

Jamsil Indoor Gymnasium remains one of Seoul's most useful mid-to-large event rooms because it sits in the sweet spot between theater intimacy and full-stadium risk. The official Seoul facility page lists the arena at 11,044 seats, with total event capacity rising to 20,000 depending on floor use, which is exactly why it continues to host concerts, basketball, ceremonies, conferences, and large public events.

The venue opened on April 18, 1979 after construction began on December 1, 1976, and its Olympic-era status is more than branding. Basketball and volleyball events for the 1988 Seoul Olympics were held here, and Seoul's own facility statistics continue to show heavy year-round use across sports and cultural programming.

The broader Seoul Sports Facilities Management Office also maintains official public channels for the complex, including the stadiumseoul X account linked from the main site. That matters because it gives the venue a cleaner first-party validation path than most event spaces that exist only through ticketing listings or fan-shot documentation.