Exhibit 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Jeffrey L. Vigil, Vice President—Finance and Chief Financial Officer of Uranium Resources, Inc. (the “Company”), certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

(1)

The Annual Report on Form 10-K of the Company for the period ended December 31, 2014 which this certification accompanies fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)

The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Jeffrey L. Vigil

Jeffrey L. Vigil
Vice President—Finance and Chief Financial Officer
March 19, 2015