Housing for the 2021 ASTRO Annual Meeting is now open. The deadline to book housing for the 2021 ASTRO Annual Meeting is Thursday, September 30, 2021.


ASTRO 2021 Housing Agent

The official housing agent for ASTRO 2021 is SPARGO, Inc.

ASTRO 2021 Hotels

View the list and map of 2021 ASTRO Annual Meeting hotels.

ASTRO 2021 Program

The ASTRO 2021 program will take place Saturday, October 23 - Wednesday, October 27. For more information on the program and the schedule, please visit our Learn page.

Housing Piracy

ASTRO works with SPARGO, Inc., the official registration and housing provider for the 2021 Annual Meeting. If you are contacted by anyone who is not a representative of SPARGO, Inc., asking if you need assistance with hotel accommodations or registration for the ASTRO Annual Meeting, please get as much information as you can and pass it along to us. Learn more about our Housing Poachers and Pirates Policy

Member Housing Benefits

ASTRO members receive the benefit of having access to prime hotel options for this year’s Annual Meeting. The Marriott Marquis Chicago has been designated as a member only hotel. This hotel is within walking distance of the McCormick Place Convention Center.

Group Attendee Housing

For your convenience, a group housing website has been created for international travel groups or other entities who plan to bring a delegation to the ASTRO Annual Meeting. The group housing website allows group organizers to reserve a block of three or more rooms for their delegation. If you would like to create a group room block, please contact Amanda Tokarski. Please note that the group housing website is for attendee reservations only. Exhibitors who need to request a room block must secure their reservations via the exhibitor housing website.


For housing questions, contact the ASTRO Housing Center:
1-800-541-6058 or 703-449-6418

American Society for Radiation Oncology
251 18th Street South, 8th Floor
Arlington, VA 22202
Telephone: 703-502-1550


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