FORM 6-K

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C.   20549

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:  1-12384

SUNCOR ENERGY INC.

(Name of registrant)

112 Fourth Avenue S.W.

P.O. Box 38

Calgary, Alberta

Canada, T2P 2V5

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

Form 20-F o Form 40-F x

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

Yes o No x

If “Yes” is marked, indicate the number assigned to the registrant in connection with Rule 12g3-2(b):

N/A

CONTROLS AND PROCEDURES

A.Disclosure Controls and Procedures

See pages 13 of Exhibit 99.2.

B.Changes in Internal Control Over Financial Reporting

See pages 13 of Exhibit 99.2.

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.

	SUNCOR ENERGY INC.
Date:	By:
July 26, 2007		“JANICE B. ODEGAARD”
	JANICE B. ODEGAARD Vice President, Associate General Counsel and Corporate Secretary

EXHIBIT INDEX

Exhibit	Description of Exhibit
99.1	Press Release Including 2007 Outlook
99.2	Interim Management’s Discussion and Analysis for the second fiscal quarter ended June 30, 2007
99.3	Interim Unaudited Financial Statements of Suncor Energy Inc. for the six months ended June 30, 2007
99.4	Certification of the President and Chief Executive Officer
99.5	Certification of the Senior Vice President and Chief Financial Officer