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Welcome to
Seattle Worldcon 2025!

Building Yesterday’s Future–For Everyone

August 13–17, 2025

Our Guests of Honor

Our Hosts

Five people dressed in retrofuturistic clothing, of varied apparent races, genders, and ages. One is in a hover chair, and one is using a jetpack.

The 83rd World Science Fiction Convention

Held in downtown Seattle, Washington, August 13–17, 2025. Bringing Worldcon back to Seattle for the first time since 1961!

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The Seattle Convention Center’s new Summit expansion in the heart of downtown Seattle, surrounded by amazing views of the city, mountains, and water.


Hundreds of hours of panel programming, presentations, workshops, events, table talks, autograph signings, kids programming, and more. Now soliciting panelists!

The Hugo Awards

Science fiction’s most prestigious award, administered and voted on by members of the World Science Fiction Convention—this means you!


A Worldcon is run entirely by unpaid, volunteer staff. You too can join this community of makers, doers, and shapers, for a few hours during the con, or throughout the planning process.

Recent Updates

Membership Upgrades Now Available

We are now ready for pre-supporters to upgrade their memberships to attending memberships in the convention (WSFS membership + attending supplement) and complete registration.

Registration and Membership Upgrades Delayed

Due to a last-minute change in our registration software, our ability to process registrations and upgrades to attending memberships for site selection voters and bid supporters has been delayed past our originally projected date.

Welcome to Seattle Worldcon 2025—Building Yesterday’s Future For Everyone

My name is Kathy Bond, Chair of this Worldcon, and I am absolutely thrilled to announce that Seattle will have the honor of hosting you all for the 83rd World Science Fiction Convention.

Seattle 2025 Worldcon Bid News September 2023

More detailed instructions for site selection voting, a new restaurant has opened at the Seattle Convention Center, and a reminder of our Base 2 Space climb.