EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-177605 on Form S-8 of our report dated February 28, 2013, relating to the financial statements of Exelis Inc., and the effectiveness of Exelis Inc.’s internal control over financial reporting, appearing in this Annual Report on Form 10-K of Exelis Inc. for the year ended December 31, 2012.

/s/    Deloitte & Touche LLP

McLean, Virginia

February 28, 2013