Filed electronically with the Securities and Exchange Commission on May 15, 2012

File No. 002-13627

File No. 811-00042

SECURITIES AND EXCHANGE COMMISSION

Washington, D. C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

Post-Effective Amendment No. 116

and

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940

Amendment No. 117

DWS PORTFOLIO TRUST

(Exact Name of Registrant as Specified in Charter)

345 Park Avenue, New York, NY           10154

(Address of Principal Executive Offices)    (Zip Code)

Registrant's Telephone Number, including Area Code:  (617) 295-1000

John Millette, Vice President and Secretary

DWS Portfolio Trust

One Beacon Street, Boston, MA  02108

(Name and Address of Agent for Service)

Copy to:

David A. Sturms, Esq.

Vedder Price P.C.

222 North LaSalle Street

Chicago, IL 60601

It is proposed that this filing will become effective:

|X|	Immediately upon filing pursuant to paragraph (b)
|__|	60 days after filing pursuant to paragraph (a)(1)
|__|	75 days after filing pursuant to paragraph (a)(2)
|__|	On _____________ pursuant to paragraph (b)
|__|	On _____________ pursuant to paragraph (a)(1)
|__|	On _____________ pursuant to paragraph (a)(2) of Rule 485
	If appropriate, check the following box:
|__|	This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

This filing relates solely to the following Fund, a series of the Registrant:

·   DWS Core Plus Income Fund – Classes A, B, C, S and Institutional Class

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, 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 amendment to its Registration Statement to be signed on its behalf by the undersigned, thereto duly authorized, in the City of New York and the State of New York on the 14th day of May 2012.

DWS PORTFOLIO TRUST

By:  /s/W. Douglas Beck

W. Douglas Beck*

President

Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment to its Registration Statement has been signed below by the following persons in the capacities and on the dates indicated:

SIGNATURE TITLE DATE

/s/W. Douglas Beck
W. Douglas Beck*	President	May 14, 2012
/s/Paul H. Schubert
Paul H. Schubert	Chief Financial Officer and Treasurer	May 14, 2012
/s/John W. Ballantine
John W. Ballantine*	Trustee	May 14, 2012
/s/Henry P. Becton, Jr.
Henry P. Becton, Jr.*	Trustee	May 14, 2012
/s/Dawn-Marie Driscoll
Dawn-Marie Driscoll*	Trustee	May 14, 2012
/s/Keith R. Fox
Keith R. Fox*	Trustee	May 14, 2012
/s/Paul K. Freeman
Paul K. Freeman*	Chairperson and Trustee	May 14, 2012
/s/Kenneth C. Froewiss
Kenneth C. Froewiss*	Trustee	May 14, 2012
/s/Richard J. Herring
Richard J. Herring*	Trustee	May 14, 2012
/s/William McClayton
William McClayton*	Trustee	May 14, 2012
/s/Rebecca W. Rimel
Rebecca W. Rimel*	Trustee	May 14, 2012
/s/William N. Searcy, Jr.
William N. Searcy, Jr.*	Trustee	May 14, 2012
/s/Jean Gleason Stromberg
Jean Gleason Stromberg*	Trustee	May 14, 2012
/s/Robert H. Wadsworth
Robert H. Wadsworth*	Trustee	May 14, 2012

*By:           /s/Caroline Pearson

Caroline Pearson**

Chief Legal Officer

** Attorney-in-fact pursuant to the powers of attorney that are incorporated herein by reference to Post-Effective Amendment No. 113 to the Registration Statement, as filed on September 28, 2011; and as filed on April 28, 2008 in Post-Effective Amendment No. 101 to the Registration Statement.

EXHIBIT INDEX

Index No.	Description 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