UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT PURSUANT TO

SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): May 15, 2007

ALLIANCE RESOURCE PARTNERS, L.P.

(Exact name of registrant as specified in its charter)

Delaware |  | Commission |  | 73-1564280
(State or other jurisdiction of incorporation or organization) |  | File No.: 0-26823 |  | (IRS Employer Identification No.)

1717 South Boulder Avenue, Suite 400, Tulsa, Oklahoma 74119

(Address of principal executive offices and zip code)

(918) 295-7600

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions:

¨ | Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

ITEM 7.01. | REGULATION FD DISCLOSURE.

In accordance with General Instruction B.2 of Form 8-K, the following information and the exhibits referenced therein is being furnished pursuant to Item 7.01 of Form 8-K and is not deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, is not subject to the liabilities of that section and is not deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.

On Tuesday, May 15, 2007 Brian L. Cantrell, Senior Vice President and Chief Financial Officer of Alliance Resource Partners, L.P. and of Alliance Holdings GP, L.P., made a presentation at the A.G. Edwards’ Yield Conference in New York City.

The presentation is available for audio replay at http://www.wsw.com/webcast/agedwards18/arlp/ and the presentation materials are available on both Alliance Resource Partners’ website (http://www.arlp.com) and Alliance Holdings GP’s website (http://www.ahgp.com) under “Investor Information” and “Investor Presentations.”

A copy of the press release and presentation materials are attached hereto as, respectively, Exhibit 99.1 and Exhibit 99.2.

ITEM 9.01 | FINANCIAL STATEMENTS AND EXHIBITS

| (d) | Exhibits

99.1 |  | Alliance Resource Partners, L.P. and Alliance Holdings GP, L.P. press release dated as of May 10, 2007.
99.2 |  | Presentation materials for the A.G. Edwards’ Yield Conference

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

|  | Alliance Resource Partners, L.P.
By: |  | Alliance Resource Management GP, LLC,
|  | its managing general partner
By: |  | /s/ Joseph W. Craft III
|  | Joseph W. Craft III President and Chief Executive Officer

Date: May 15, 2007

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