As filed with the Securities and Exchange Commission on June 20, 2011

File No. 002-77048

File No. 811-03451

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933	o
POST-EFFECTIVE AMENDMENT NO. 61	x
and
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	o
AMENDMENT NO. 60	x

SEI DAILY INCOME TRUST

(Exact Name of Registrant as Specified in Charter)

SEI Investments Company
One Freedom Valley Drive
Oaks, Pennsylvania 19456
(Address of Principal Executive Offices) (Zip Code)

Registrant’s Telephone Number, including Area Code (610) 676-1000

Timothy D. Barto
SEI Investments Company
One Freedom Valley Drive
Oaks, Pennsylvania 19456
(Name and Address of Agent for Service)

Copy to:

Timothy W. Levin, Esquire
Morgan, Lewis & Bockius LLP
1701 Market Street
Philadelphia, Pennsylvania 19103

It is proposed that this filing become effective (check appropriate box)

x immediately upon filing pursuant to paragraph (b)

o on [date] pursuant to paragraph (b)

o 60 days after filing pursuant to paragraph (a)(1)

o on [date] pursuant to paragraph (a)(1)

o 75 days after filing pursuant to paragraph (a)(2)

o on [date] pursuant to paragraph (a)(2) of rule 485.

If appropriate, check the following box:

o This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

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 has duly caused this Post-Effective Amendment No. 61 to Registration Statement No. 002-77048 to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Oaks, Commonwealth of Pennsylvania on the 20th day of June, 2011.

SEI Daily Income Trust
By:	/s/ Robert A. Nesher
Robert A. Nesher
Trustee, President & Chief Executive Officer

Pursuant to the requirements of the Securities Act of 1933, this Amendment to the Registration Statement has been signed below by the following persons in the capacities and on the date(s) indicated.

*	Trustee	June 20, 2011
Rosemarie B. Greco
*	Trustee	June 20, 2011
William M. Doran
*	Trustee	June 20, 2011
George J. Sullivan, Jr.
*	Trustee	June 20, 2011
Nina Lesavoy
*	Trustee	June 20, 2011
James M. Williams
*	Trustee	June 20, 2011
Mitchell A. Johnson
*	Trustee	June 20, 2011
Hubert L. Harris, Jr.
/s/ Robert A. Nesher	Trustee, President & Chief	June 20, 2011
Robert A. Nesher	Executive Officer
/s/ Peter Rodriguez	Controller & Chief	June 20, 2011
Peter Rodriguez	Financial Officer

*By:	/s/ Robert A. Nesher
	Robert A. Nesher
	Attorney-in-Fact

INDEX TO EXHIBITS

EXHIBIT NO.	DESCRIPTION OF EXHIBIT	PAGE NO.
	Risk/return summary of each Fund’s prospectus as an Interactive Data File using eXtensible Business Reporting Language (“XBRL”)