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): June 14, 2005

NorthWestern Corporation

(Exact name of registrant as specified in its charter)

Delaware	0-692	46-0172280
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)

125 South Dakota Avenue Sioux Falls, South Dakota		57104
(Address of principal executive offices)		(Zip Code)

(605) 978-2908
(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 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))

Item 7.01 Regulation FD Disclosure.

On June 14, 2005, Michael J. Hanson, president and chief executive officer, and Brian B. Bird, chief financial officer, of NorthWestern Corporation d/b/a NorthWestern Energy (NASDAQ:NWEC) made a presentation to financial analysts and investors in New York at the Deutsche Bank Securities 10th Annual Electric Power Conference and reaffirmed previous earnings guidance on basic earnings from continuing operations of $1.30 to $1.45 per share for the year ended December 31, 2005.

A copy of the slide presentation that Mr. Hanson and Mr. Bird used in making their remarks is being furnished pursuant to Regulation FD as Exhibit 99.1 to this Current Report on Form 8-K and is herein incorporated by reference. The presentation shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. Furthermore, the presentation shall not be deemed to be incorporated by reference into the Company’s filings under the Securities Act of 1933, as amended, or under the Securities Exchange Act of 1934, as amended, except as set forth with respect thereto in any such filing.

Item 9.01 Financial Statements and Exhibits

EXHIBIT NO.		DESCRIPTION OF DOCUMENT
99.1*		Slide Presentation of NorthWestern Corporation dated June 14, 2005

* filed herewith

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 hereunto duly authorized.

	NorthWestern Corporation


	By:	/s/ Thomas J. Knapp
		Thomas J. Knapp
		General Counsel

Date: June 14, 2005

Index to Exhibits

EXHIBIT NO.		DESCRIPTION OF DOCUMENT
99.1*		Slide Presentation of NorthWestern Corporation dated June 14, 2005

* filed herewith

FORM 8-K

Thomas J. Knapp

General Counsel