Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in this Registration Statement on Form S-3 of our report dated March 25, 2019, relating to the financial statements of Tilray, Inc. and subsidiaries (the “Company”) appearing in the Annual Report on Form 10-K of the Company for the year ended December 31, 2018, and to reference to us under the heading “Experts” in the Prospectuses, which are part of this Registration Statement.

/s/ Deloitte LLP

Chartered Professional Accountants

Vancouver, Canada

September 10, 2019