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August 2, 2016

Board of Directors

Uranium Resources, Inc.

6950 South Potomac Street, Suite 300

Centennial, Colorado 80112

Ladies and Gentlemen:

We are acting as counsel to Uranium Resources, Inc., a Delaware corporation (the “Company”), in connection with its registration statement on Form S-3 (the “Registration Statement”), filed with the Securities and Exchange Commission under the Securities Act of 1933, as amended, relating to the resale from time to time by the selling stockholders identified in the prospectus constituting a part of the Registration Statement of up to 97,894 shares of the Company’s common stock, par value $0.001 per share, comprising: (i) 47,229 shares of common stock issued to Cantor Fitzgerald & Co. pursuant to that certain letter agreement, dated March 4, 2015, between the Company and Cantor Fitzgerald & Co., in satisfaction of fees due thereunder, and (ii) 50,665 shares of common stock issued to Robert Annett pursuant to the terms of a Consultancy Agreement, dated May 1, 2014, between Anatolia Energy Limited, a wholly-owned subsidiary of the Company, and Wiranja Pty Ltd (d/b/a Bob Annett Consulting) (collectively, the “Shares”). This opinion letter is furnished to you at your request to enable you to fulfill the requirements of Item 601(b)(5) of Regulation S-K, 17 C.F.R. § 229.601(b)(5), in connection with the Registration Statement.

For purposes of this opinion letter, we have examined copies of such agreements, instruments and documents as we have deemed an appropriate basis on which to render the opinions hereinafter expressed.  In our examination of the aforesaid documents, we have assumed the genuineness of all signatures, the legal capacity of all natural persons, the accuracy and completeness of all documents submitted to us, the authenticity of all original documents, and the conformity to authentic original documents of all documents submitted to us as copies (including telecopies).  As to all matters of fact, we have relied on the representations and statements of fact made in the documents so reviewed, and we have not independently established the facts so relied on.  This opinion letter is given, and all statements herein are made, in the context of the foregoing.

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Board of Directors                              Uranium Resources, Inc.                    - 2 -                                            August 2, 2016

This opinion letter is based as to matters of law solely on the Delaware General Corporation Law, as amended. We express no opinion herein as to any other statutes, rules or regulations.

Based upon, subject to and limited by the foregoing, we are of the opinion that the Shares are validly issued, fully paid, and nonassessable.

This opinion letter has been prepared for use in connection with the Registration Statement.  We assume no obligation to advise you of any changes in the foregoing subsequent to the effective date of the Registration Statement.

We hereby consent to the filing of this opinion letter as Exhibit 5.1 to the Registration Statement and to the reference to this firm under the caption “Legal Matters” in the prospectus constituting a part of the Registration Statement.  In giving this consent, we do not thereby admit that we are an “expert” within the meaning of the Securities Act of 1933, as amended.

Very truly yours,

/s/ Hogan Lovells US LLP

HOGAN LOVELLS US LLP