Quad/Graphics (QUAD) 10-K 2018 FY Annual report

Exhibit 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement Nos. 333-168924, 333-183161, 333-192127, and 333-212843 on Form S-8 and Registration Statement Nos. 333-228752 and 333-165259 on Form S-4 of our reports dated February 20, 2019, relating to the consolidated financial statements of Quad/Graphics, Inc. and subsidiaries, and the effectiveness of Quad/Graphics, Inc.'s internal control over financial reporting, appearing in this Annual Report on Form 10-K of Quad/Graphics, Inc. for the year ended December 31, 2018.

/s/ Deloitte & Touche LLP

Milwaukee, Wisconsin

February 20, 2019