Packaging Corporation of America (PKG) 8-K 2013 FY Other Events

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statements of Packaging Corporation of America (Form S-8 No. 333-179620 and Form S-8 No. 333-159576) of our reports dated February 28, 2014, except for Note 2, as to which the date is May 9, 2014 with respect to the consolidated financial statements and schedule of Packaging Corporation of America and the effectiveness of internal control over financial reporting of Packaging Corporation of America, included in this Current Report on Form 8-K of Packaging Corporation of America dated May 9, 2014.

/s/ Ernst & Young LLP

Chicago, Illinois

May 9, 2014