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                          June 24, 2021

       Mark 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 21, 2021
                                                            File No. 333-257195

       Dear Mr. 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 Timothy
Collins at 202-551-3176 with any questions.




                          Sincerely,


                          Division of Corporation Finance

                          Office of Energy & Transportation
       cc:                                              Andrew Thomas