Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in Registration Statement Nos. 333-83124, 333-207413 and 333-237414 on Form S-8 of our report dated June 29, 2020, appearing in this Annual Report on Form 11-K of the Occidental Petroleum Corporation Savings Plan for the year ended December 31, 2019.

/s/ WEAVER AND TIDWELL, L.L.P.

Houston, Texas

June 29, 2020