SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 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): August 1, 2005

OTTER TAIL CORPORATION

(Exact name of registrant as specified in its charter)

Minnesota
(State or other jurisdiction
of incorporation) 0-00368
(Commission
File Number) 41-0462685
(I.R.S. Employer
Identification No.)

215 South Cascade Street, P.O. Box 496, Fergus Falls, MN
(Address of principal executive offices) 56538-0496
(Zip Code)

Registrant’s telephone number, including area code: (866) 410-8780

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

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

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

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

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

TABLE OF CONTENTS

Press Release

Item 2.02 Results of Operations and Financial Condition

     On August 1, 2005 Otter Tail Corporation issued a press release concerning consolidated financial results for the second quarter of 2005, a copy of which is furnished herewith as Exhibit 99.1.

Item 9.01 Financial Statement and Exhibits

     (c) Exhibits

          99.1 Press Release issued August 1, 2005

Signature

     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.

	OTTER TAIL CORPORATION
Date: August 1, 2005
	By:	/s/ Kevin G. Moug
		Kevin G. Moug
		Chief Financial Officer and Treasurer

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EXHIBIT INDEX

Exhibit	Description of Exhibit
99.1	Press release, dated August 1, 2005

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