UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16
of the Securities Exchange Act of 1934

For the month of July, 2007

Commission File Number: 1-31927

NORTHERN ORION RESOURCES INC.
(Translation of registrant's name into English)

Suite 250 - 1075 West Georgia Street Vancouver, British Columbia, Canada V6E 3C9
(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

¨ Form 20-F x Form 40-F

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ¨

Indicate by check mark whether by furnishing the information contained in this Form, the registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes ¨ No x

If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-

SUBMITTED HEREWITH

Exhibits

	99.1	Agreement Letter Dated June 27, 2007

	99.2	Material Change Report Dated June 27, 2007

	99.3	Yamana Gold Announces Agreement with Northern Orion Dated June 28, 2007

	99.4	Yamana Gold and Northern Orion Respond to Meridian Gold Announcement Dated July 4, 2007

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.

	NORTHERN ORION RESOURCES INC.
	(Registrant)

Date: July 5, 2007	By:	/s/ Horng Dih Lee

		Horng Dih Lee
	Title:	Vice President Finance and CFO

NORTHERN ORION RESOURCES INC 6-K