Best Venues in Seoul for 300-Person Conferences

Planning a 300-person conference in Seoul? This is the sweet spot where you have the most venue choice — big enough to need real infrastructure, small enough to fit dedicated convention halls, five-star hotel ballrooms, and flexible event spaces. The strongest options are COEX's mid-size halls, Grand InterContinental Seoul Parnas, EL Tower, and Sono Felice Convention. Here's how to choose.

Why 300 is the flexible middle

At 300 guests you clear the threshold where casual spaces stop working, but you're still below the scale that forces you into only the largest halls. That means the widest menu: hotels, convention centers, and purpose-built event buildings all compete for your booking — which is good news for both fit and price. The decision comes down to whether you want in-house F&B and service (hotels) or more flexible vendor rules and space (convention facilities).

Hotel ballrooms

For a 300-person conference that wants full service, five-star hotels are the reliable choice. Grand InterContinental Seoul Parnas, connected to COEX, pairs ballroom capacity with breakout rooms and strong AV — ideal when your program has a main stage plus sessions. Signiel Seoul atop Lotte World Tower adds a premium address and skyline views for conferences that double as a statement.

Convention & event facilities

For more flexibility and often better value, dedicated event buildings shine at this size. EL Tower in Yangjae and Sono Felice Convention offer grand halls with modern fit-outs, easier vendor rules, and space for registration and exhibition alongside the main room. Plenty Convention is another strong mid-size pick.

The COEX option

If your conference benefits from being in Korea's MICE hub — with connected hotels, a mall, and subway access — COEX's meeting rooms and mid-size halls seat 300 comfortably while keeping you beside exhibition space and international-standard infrastructure. It's the default for conferences expecting overseas delegates.

Planning a 300-person conference

1. Confirm the seating format. 300 theater-style, banquet, and classroom need very different room sizes — get the number for your format.
2. Book breakouts early. At this size many programs add parallel sessions; secure the extra rooms with the main hall.
3. Registration flow. 300 people arriving at once needs a registration plan — budget desks at roughly one per 50–80 guests.
4. Lock 2–3 months ahead, longer during peak conference seasons.

Frequently asked questions

What's the best venue in Seoul for a 300-person conference? Grand InterContinental Seoul Parnas or Signiel for full-service hotel ballrooms; EL Tower, Sono Felice, or Plenty Convention for dedicated event facilities with more flexibility and value; COEX if you want Korea's MICE hub with connected infrastructure.

Do I need a hotel or a convention center for 300 people? Both work at this size. Hotels include F&B and service; convention facilities offer more flexible vendor rules, space for exhibition, and often better value. Choose based on your program and budget.

How far ahead should I book? Two to three months for most venues, and earlier during peak conference weeks such as Korea Blockchain Week (September 29 – October 1, 2026).

How much does a 300-person conference in Seoul cost? Most land in the ₩80–150M range all-in depending on venue, F&B, and production. See our Seoul corporate event budget guide for the breakdown.

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Event Korea helps international teams shortlist and book Seoul venues for conferences of any size — free for organizers. Tell us your brief and we'll send options with availability.