To obtain the necessary amount of meeting and exhibit space, COSM must commit to using a minimum number of guest rooms. If that commitment is not met, COSM will incur significant financial penalties and it will cause a major impact on the future programs that COSM is able to offer. By booking your room under the official COSM room block, you help COSM meet their hotel obligation. We thank you in advance for your assistance.

HOTELS
Hilton Boston Back Bay
Just added!
40 Dalton Street, Boston, MA 02115
$379 single or double occupancy (standard King or Double Queen) plus tax
COSM RESERVATIONS DEADLINE: April 1, or when reservation block is filled
RESERVE ONLINE

Boston Marriot Copley Place
Limited rooms available!
110 Huntington Avenue, Boston, MA 02116
$319 single or double occupancy (standard King or Double Queen) plus tax
COSM RESERVATIONS DEADLINE: April 1, or when reservation block is filled
RESERVE ONLINE

Sheraton Boston
Limited rooms available!
39 Dalton Street, Boston, MA 02199
$319 single or double occupancy (standard King or Double Queen) plus tax
COSM RESERVATIONS DEADLINE: April 1, or when reservation block is filled
RESERVE ONLINE

COSM 2023 Scientific Programs will take place at the Hynes Convention Center. All business and social events will take place at the Sheraton Boston Hotel. 

Both Hotels are connected to the Hynes Convention Center via the Hotel Shopping Complex. 

Need assistance with your hotel reservations? Contact cosmsupport@facs.org.

NOTE: It has come to our attention that companies, not affiliated with COSM or COSM Societies, are claiming to offer COSM registration and housing services. Registration and Housing should only be accessed through the COSM website and reserved through COSM’s official registration and housing providers.