UNITED STATES

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: May 19, 2011

(Date of Earliest Event Reported)

Cost Plus, Inc.

(Exact name of Registrant as specified in its charter)

California	0-14970	94-1067973
(State or other jurisdiction of incorporation or organization)	(Commission File Number)	(I.R.S. Employer Identification No.)

200 4^th Street

Oakland, California 94607

(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code (510) 893-7300

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:

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

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

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

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

Item 2.02 Results of Operations and Financial Condition

On May 19, 2011, Cost Plus, Inc. (the “Company”) issued a press release regarding its first quarter sales and earnings data for fiscal 2011 in which it also provided initial guidance for the second quarter of fiscal 2011 and increased guidance for the full year of fiscal 2011. A copy of the press release is attached as Exhibit 99.1 hereto.

Pursuant to General Instruction B.2 of Form 8-K, the press release attached as Exhibit 99.1 is not “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, but is instead furnished for purposes of that instruction.

Item 9.01 Financial Statements and Exhibits

(d) Exhibits.

Exhibit Number	Description
99.1	Press Release of Cost Plus, Inc. dated May 19, 2011.

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.

COST PLUS, INC.
By:	/s/ Jane L. Baughman
	Jane L. Baughman,
	Executive Vice President and Chief Financial Officer (Principal Financial & Accounting Officer)

Dated: May 19, 2011

EXHIBIT INDEX

Exhibit Number	Description
99.1	Press Release of Cost Plus, Inc. dated May 19, 2011.