SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT (NO. 33-82366)

UNDER

THE SECURITIES ACT OF 1933

Pre-Effective Amendment No.

Post-Effective Amendment No. 66

and

REGISTRATION STATEMENT

UNDER

THE INVESTMENT COMPANY ACT OF 1940

Investment Company Act File No. 811-08690

Amendment No. 68

MASSMUTUAL PREMIER FUNDS

(Exact Name of Registrant as Specified in Declaration of Trust)

100 Bright Meadow Blvd.

Enfield, CT 06082

(860) 562-1000

Name and Address of Agent for Service

Andrew M. Goldberg, Esq.

Vice President, Secretary, and Chief Legal Officer

MassMutual Premier Funds

100 Bright Meadow Blvd.

Enfield, CT 06082

Copy to:

Timothy W. Diggins, Esq.

Ropes & Gray LLP

The Prudential Tower

800 Boylston Street

Boston, MA 02199-3600

It is proposed that this filing become effective on February 24, 2015 pursuant to paragraph (b) of rule 485.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all of the requirements for effectiveness of this Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933, and the Registrant has duly caused this Post-Effective Amendment No. 66 to its Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the Town of Enfield and the State of Connecticut as of the 24^th day of February, 2015.

MASSMUTUAL PREMIER FUNDS
By:	/s/ ERIC WIETSMA
	Eric Wietsma
	President

Pursuant to the requirements of the Securities Act of 1933, as amended, this Post-Effective Amendment No. 66 to the Registration Statement has been signed by the following persons in the capacities as indicated as of the 24^th day of February, 2015.

Signature	Title
/s/ ERIC WIETSMA	President and Chief Executive Officer
Eric Wietsma
/s/ NICHOLAS H. PALMERINO	Chief Financial Officer and Treasurer
Nicholas H. Palmerino
*	Chairman and Trustee
Richard H. Ayers
*	Trustee
Allan W. Blair
*	Trustee
Nabil N. El-Hage
*	Trustee
Maria D. Furman
*	Trustee
R. Alan Hunter, Jr.
*	Trustee
Robert E. Joyal
*	Trustee
F. William Marshall, Jr.
*	Trustee
C. Ann Merrifield
*	Trustee
Elaine A. Sarsynski
*	Trustee
Susan B. Sweeney

INDEX TO EXHIBITS

Exhibit No.	Title of Exhibit
EX-101.INS	XBRL Instance Document
EX-101.SCH	XBRL Taxonomy Extension Schema Document
EX-101.CAL	XBRL Taxonomy Extension Calculation Linkbase
EX-101.DEF	XBRL Taxonomy Extension Definition Linkbase
EX-101.LAB	XBRL Taxonomy Extension Labels Linkbase
EX-101.PRE	XBRL Taxonomy Extension Presentation Linkbase