EX-5.1

Exhibit 5.1

OPINION OF COUNSEL

May 31, 2019

Corteva, Inc.

974 Centre Road

Wilmington, Delaware 19805

Ladies and Gentlemen:

Reference is hereby made to the Registration Statement on Form S-8 being filed by Corteva, Inc. (the “Company”) with the Securities and Exchange Commission, relating to the registration of 42,000,000 shares of common stock, par value $0.01 per share (the “Common Stock”), of the Company, which are issuable pursuant to the Corteva, Inc. 2019 Omnibus Incentive Plan, the Corteva, Inc. Retirement Savings Plan, the Corteva, Inc. Management Deferred Compensation Plan and the Corteva, Inc. Deferred Compensation and Stock Accumulation Plan.

In rendering the opinions expressed below, I or a member of my staff have examined and relied upon: (a) the Certificate of Incorporation of the Company; (b) the form of Amended and Restated Certificate of Incorporation of the Company filed as Exhibit 3.1 to the Registration Statement on Form S-8; (c) the Bylaws of the Company; (d) the form of Amended and Restated Bylaws of the Company filed as Exhibit 3.2 to the Registration Statement on Form S-8; (e) the Registration Statement on Form S-8; (f) certain resolutions of the Board of Directors of the Company; and (g) such other documents, corporate records and instruments as I have deemed necessary or appropriate to form a basis for the opinions hereinafter expressed.

In connection with this opinion, I have assumed the genuineness of all signatures on all documents examined by me and the authenticity of all documents submitted to me as originals and the conformity to the originals of all documents submitted to me as copies.

Based on the foregoing, and subject to the assumptions, limitations and qualifications herein set forth, it is my opinion that:

The Company is validly existing and in good standing under the laws of the State of Delaware; and

When the Company’s Amended and Restated Certificate of Incorporation has been filed with the Secretary of State of the State of Delaware and has become effective and the Board of Directors of the Company, including any appropriate committee appointed thereby, has taken all necessary corporate action to adopt the Company’s Amended and Restated Bylaws, the Common Stock has been duly authorized for issuance and, when issued and delivered in accordance with the terms set forth in the applicable plan, will be validly issued, fully paid and nonassessable.

I do not express any opinion with respect to the law of any jurisdiction other than Delaware corporate law (including, to the extent applicable, the Delaware constitution and judicial decisions) and I do not express any opinion as to the effect of any other laws on the opinion herein stated. This opinion is given as of the date hereof. I assume no obligation to update or supplement this opinion to reflect any facts or circumstances which may hereafter occur or come to my attention or any changes in law which may hereafter occur.