CSX (CSX) 11-K Annual report of employee stock purchases

EXHIBIT 23

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statements (Forms S-8 No. 33-41735, 333-160650, and 333-193785) pertaining to the CSX Corporation 401(k) Plan of our report dated June 21, 2017, with respect to the financial statements and schedule of the CSX Corporation 401(k) Plan included in this Annual Report (Form 11-K) for the year ended December 31, 2016.

/s/ Ernst & Young LLP

Certified Public Accountants

Jacksonville, Florida

June 21, 2017

I-1