United States securities and exchange commission logo May 20, 2024 Ram Aiyar President and Chief Executive Officer Korro Bio, Inc. One Kendall Square, Building 600-700 Suite 6-401 Cambridge, MA 02139 Re: Korro Bio, Inc. Registration Statement on Form S-1 Filed May 14, 2024 File No. 333-279402 Dear Ram Aiyar: 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 Chris Edwards at 202-551-6761 with any questions. Sincerely, Division of Corporation Finance Office of Life Sciences cc: Marianne C. Sarrazin, Esq.