Exhibit 23.1

Consent of Qualified Person

I, Joseph Havasi, the Director, Natural Resources of Compass Minerals International, Inc., a Delaware corporation (the “Registrant”), am the qualified person (as defined in Item 1300 of Regulation S-K) that prepared, in accordance with Items 601(b)(96) and 1300 through 1305 of Regulation S-K: (i) the Technical Report Summary relating to potassium and sulfate of potash mineral resources and reserves at the Registrant’s Ogden facility, dated November 29, 2021, with an effective date of September 30, 2021 (the “Ogden Potassium TRS”), filed as Exhibit 96.1 to the Registrant’s Current Report on Form 8-K filed on November 29, 2021 (the “Form 8-K”) and incorporated by reference into the Registrant’s Transition Report on Form 10-KT for the transition period from January 1, 2021 to September 30, 2021 (the “Form 10-KT”); (ii) the Technical Report Summary relating to lithium mineral resources at the Registrant’s Ogden facility, dated July 13, 2021, with an effective date of June 1, 2021 (the “Ogden Lithium TRS”), filed as Exhibit 96.2 to the Form 8-K and incorporated by reference into the Form 10-KT; (iii) the Technical Report Summary relating to the Registrant’s Cote Blanche mine, dated November 29, 2021, with an effective date of September 30, 2021 (the “Cote Blanche TRS”), filed as Exhibit 96.3 to the Form 10-KT; and (iv) the Technical Report Summary relating to the Registrant’s Goderich mine, dated November 29, 2021, with an effective date of September 30, 2021 (collectively with the Ogden Potassium TRS, the Ogden Lithium TRS and the Cote Blanche TRS, the “TRS’s”), filed as Exhibit 96.4 to the Form 10-KT, and hereby consent to:

1.the incorporation by reference of the TRS’s into the following registration statements of the Registrant (collectively, the “Registration Statements”):

a.Registration Statement on Form S-8 (Registration No. 333-119410), filed on September 30, 2004, relating to the Compass Minerals International, Inc. Directors’ Deferred Compensation Plan;

b.Registration Statement on Form S-8 (Registration No. 333-121965), filed on January 11, 2005, relating to the Compass Minerals International, Inc. Savings Plan;

c.Registration Statement on Form S-8 (Registration No. 333-127699), filed on August 19, 2005, relating to the Compass Minerals International, Inc. 2005 Incentive Award Plan;

d.Registration Statement on Form S-8 (Registration No. 333-203922), filed on May 6, 2015, relating to the Compass Minerals International, Inc. 2015 Incentive Award Plan; and

e.Registration Statement on Form S-8 (Registration No. 333-23852), filed on May 14, 2020, relating to the Compass Minerals International, Inc. 2020 Incentive Award Plan;

2.the use of and references to my name, including my status as an expert or qualified person (as defined in Item 1300 of Regulation S-K) with respect to the TRS’s, in connection with the Registration Statements; and

3.the incorporation by reference into the Registration Statements of any quotation from, or summarization of, the TRS’s in the Form 10-KT.

Date: December 8, 2021	/s/ Joseph Havasi
	Name: Joseph Havasi
	Title: Director, Natural Resources Compass Minerals International, Inc.