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                          July 8, 2020

       Sujal Shah
       Chief Executive Officer
       CymaBay Therapeutics, Inc.
       7575 Gateway Blvd, Suite 110
       Newark, CA 94560

                                                        Re: CymaBay
Therapeutics, Inc.
                                                            Registration
Statement on Form S-3
                                                            Filed July 2, 2020
                                                            File No. 333-239670

       Dear Mr. Shah:

              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 Ada D.
Sarmento at 202-551-3798 with any questions.




                          Sincerely,


                          Division of Corporation Finance

                          Office of Life Sciences
       cc:                                              Matthew B. Hemington,
Esq.