Southwestern Energy (SWN) 10-Q 2010 Q2 Quarterly report

Exhibit 32.1

CERTIFICATION
Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
(Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code)

          Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of title 18, United States Code), each of the undersigned officers of Southwestern Energy Company, a Delaware corporation (the "Company"), does hereby certify that:

          The Quarterly Report on Form 10-Q for the quarter ended June 30, 2010 (the "Form 10-Q") of the Company fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 and information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated:      August 5, 2010	/s/ STEVE MUELLER
	Steve Mueller
	Chief Executive Officer
Dated:     August 5, 2010	/s/ GREG D. KERLEY
	Greg D. Kerley
	Chief Financial Officer