Welcome to
Seattle Worldcon 2025!

Building Yesterday’s Future–For Everyone

August 13–17, 2025

A light-skinned person wearing pink and purple retro-futuristic clothing and helmet sits in a floating chair, holding one hand out gesturing to the viewer's left.

Our Guests of Honor

Martha Wells, a white woman with shoulder-length wavy dark blonde hair and waring a dark top, looks at the camera with a slight smile.

Martha Wells

Donato Giancola, a man with short-cut dark hair and goatee, wearing a grey t-shirt and jeans, sitting in the midst of an artist's studio, with finished and in-progress paintings and paint supplies around him.

Donato Giancola

Bridget Landry, a white woman with blonde medium-length hair, looking directly at the camera.

Bridget Landry

Alexander James Adams, a white man with long brown and grey hair in a ponytail, wearing a black sleeveless shirt and cowboy hat, plays a guitar and sings into a microphone.

Alexander James Adams

Our Hosts

K Tempest Bradford, a Black woman with curly black hair, wearing glasses, black lipstick, and a red and orange top, smiles at the camera.

K. Tempest Bradford

Nisi Shawl, a Black woman with grey hair, wearing glasses, a flowered hairband and a green top, smiling.

Nisi Shawl

Seattle Worldcon 2025 logo

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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Venue

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

Program

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!

Volunteer

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.