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 reports dated February 18, 2021, relating to the financial statements of Church & Dwight Co., Inc., and the effectiveness of Church & Dwight Co., Inc.’s internal control over financial reporting, appearing in the Annual Report on Form 10-K of Church & Dwight Co., Inc. for the year ended December 31, 2020, and to the reference to us under the heading “Experts” in the Prospectus, which is part of this Registration Statement.

/s/ Deloitte & Touche LLP

Parsippany, NJ

March 25, 2021