United States securities and exchange commission logo





                           June 24, 2024

       Mark A. Smith
       President and Chief Executive Officer
       NioCorp Developments Ltd.
       7000 South Yosemite Street, Suite 115
       Centennial, CO 80112

                                                        Re: NioCorp
Developments Ltd.
                                                            Registration
Statement on Form S-3
                                                            Filed June 13, 2024
                                                            File No. 333-280176

       Dear Mark A. Smith:

              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 Michael
Purcell at 202-551-5351 with any questions.




                           Sincerely,


                           Division of Corporation Finance

                           Office of Energy & Transportation
       cc:                                              Neal Shah