EXHIBITS 5.1 AND 23.2

OPINION OF DAVIS POLK & WARDWELL LLP

January 29, 2020

Facebook, Inc. 1601 Willow Road
Menlo Park, California 94025

Ladies and Gentlemen:

We have acted as special counsel to Facebook, Inc., a Delaware corporation (the “Company”), and are delivering this opinion in connection with the filing of the Company’s Registration Statement on Form S‑8 (the “Registration Statement”) with the Securities and Exchange Commission for the purpose of registering under the Securities Act of 1933, as amended (the “Securities Act”), an aggregate of 60,188,143 shares of Class A common stock, $0.000006 par value per share (the “Securities”), issuable pursuant to the Company’s 2012 Equity Incentive Plan, as amended and restated to date (the “Plan”).

We, as your counsel, have examined originals or copies of such documents, corporate records, certificates of public officials and other instruments as we have deemed necessary or advisable for the purpose of rendering this opinion.

In rendering the opinion expressed herein, we have, without independent inquiry or investigation, assumed that (i) all documents submitted to us as originals are authentic and complete, (ii) all documents submitted to us as copies conform to authentic, complete originals, (iii) all signatures on all documents that we reviewed are genuine, (iv) all natural persons executing documents had and have the legal capacity to do so, (v) all statements in certificates of public officials and officers of the Company that we reviewed were and are accurate and (vi) all representations made by the Company as to matters of fact in the documents that we reviewed were and are accurate.

On the basis of the foregoing, we are of the opinion that the Securities have been duly authorized and, when and to the extent issued pursuant to the Plan upon receipt by the Company of the consideration for the Securities specified therein, will be validly issued, fully paid and non-assessable.

We are members of the Bar of the State of New York and the foregoing opinion is limited to the laws of the State of New York and the General Corporation Law of the State of Delaware.

We hereby consent to the filing of this opinion as an exhibit to the Registration Statement. In giving this consent, we do not admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act.

Very truly yours,

/s/ Davis Polk & Wardwell LLP

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Davis Polk & Wardwell LLP