United States securities and exchange commission logo September 10, 2020 Olivia K. Bloom Chief Financial Officer Geron Corporation 919 East Hillsdale Boulevard, Suite 250 Foster City, CA 94404 Re: Geron Corporation Registration Statement on Form S-3 Filed September 4, 2020 File No. 333-248637 Dear Ms. Bloom: This is to advise you that we have not reviewed and will not review your registration statement. Please refer to Rules 460 and 461 regarding requests for acceleration. We remind you that the company and its management are responsible for the accuracy and adequacy of their disclosures, notwithstanding any review, comments, action or absence of action by the staff. Please contact Abby Adams at (202) 551-6902 with any questions. Sincerely, Division of Corporation Finance Office of Life Sciences cc: Chad Mills, Esq.