Compass Minerals 9900 W. 109^th Street Overland Park, Kansas 66210 www.compassminerals.com 913-344-9200

Mr. Raj Rajan

United States Securities and Exchange Commission

Division of Corporation Finance

Washington, D.C. 20549

October 22, 2014

RE: Compass Minerals International, Inc.

Form 10-K for the fiscal year ended December 31, 2013

Filed February 24, 2014

File No. 001-31921

Dear Mr. Rajan:

Compass Minerals International, Inc., a Delaware Corporation (“Compass Minerals”) is requesting an extension to respond to the Division of Corporation Finance’s letter dated October 16, 2014 regarding the above-referenced filing. Compass Minerals has been considering the issues raised in your comment letter and working to respond. However, due to schedules and availability of personnel whose input and/or review is needed as well as obtaining the mining related information from various countries, Compass Minerals believes that it will require additional time to respond. Compass Minerals believes it will be able to respond around November 21, 2014. Thank you for your consideration.

/s/ Rodney Underdown

Rodney Underdown

Chief Financial Officer

and Principal Accounting Officer