COSI will reopen to COSI Members on July 8, 2020 and to the general public on July 15, 2020.
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How soon after my purchase can I begin using my membership?

When you purchase a COSI membership, it becomes effective immediately. Keep your receipt or email confirmation to use as proof of membership until your cards arrive in the mail.

If you are waiting on your membership cards, you can visit at anytime by presenting a photo ID for verification at the COSI Box Office.

If you plan on visiting an ASTC or ACM reciprocal museum please call 614.228.COSI (2674) or This email address is being protected from spambots. You need JavaScript enabled to view it. to request a temporary proof of membership letter.

  • September 22, 2015

E-Mail Membership Team

CALL: 614.228.2674
Mon-Sat, 9am - 4pm EST

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