USA Truck (USAK) 10-K 2015 FY Annual report

EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We have issued our reports dated February 23, 2016, with respect to the consolidated financial statements and internal control over financial reporting included in the Annual Report of USA Truck, Inc. on Form 10-K for the year ended December 31, 2015. We consent to the incorporation by reference of said reports in the Registration Statements of USA Truck, Inc. on Forms S-8 (File No. 333-196695, effective June 11, 2014, File No. 333-117856, effective August 2, 2004, and File No. 333-40317, effective November 14, 1997).

/s/ GRANT THORNTON LLP

Tulsa, Oklahoma

February 23, 2016