UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                    FORM 8-A

                FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                     PURSUANT TO SECTION 12(B) OR (G) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


               EATON VANCE SHORT DURATION DIVERSIFIED INCOME FUND
               --------------------------------------------------
             (Exact Name of Registrant as Specified in this Charter)

           Massachusetts                                 20-2135837
           -------------                                 ----------
(State of Incorporation or Organization)    (I.R.S. Employer Identification No.)

       The Eaton Vance Building
          255 State Street
       Boston, Massachusetts                                             02109
       ---------------------                                             -----
(Address of Principal Executive Office)                               (Zip Code)

     If this form relates to the registration of a class of securities  pursuant
to  Section  12(b) of the  Exchange  Act and is  effective  pursuant  to General
Instruction A.(c), check the following box. [X]

     If this form relates to the registration of a class of securities  pursuant
to  Section  12(g) of the  Exchange  Act and is  effective  pursuant  to General
Instruction A.(d), check the following box. [ ]

Securities  Act  registration  statement file number to which this form relates:
333-114596

Securities to be registered pursuant to Section 12(b) of the Act:

         Title of Each Class                   Name of Each Exchange On Which
         To Be So Registered                   Each Class Is To Be Registered
         -------------------                   ------------------------------

Common Shares of Beneficial Interest,             New York Stock Exchange
      $0.01 Par Value Per Share


Securities to be registered pursuant to Section 12(g) of the Act:

                                      None
                                      ----
                                (Title of Class)



                 INFORMATION REQUIRED IN REGISTRATION STATEMENT

Item 1: Description of Registrant's Securities to be Registered.

     The  description  of  the  Registrant's  securities  to  be  registered  is
     incorporated  by reference to the  description  contained under the caption
     "Description  of  Capital  Structure"  in  the  Registrant's   Registration
     Statement  on  Form  N-2  (Nos.   333-114596   and   811-21563)   as  filed
     electronically  with the  Securities  and Exchange  Commission on April 19,
     2004 (Accession No. 0000898432-04-000354)  ("Registration Statement on Form
     N-2"), as the same may be amended.

Item 2: Exhibits.

     (a)  The following exhibits are being filed with the Commission:

          1.   Registrant's  Registration  Statement on Form N-2 is incorporated
               herein by reference.

          2.   Declaration   of   Trust   of   Registrant,   which   was   filed
               electronically  as exhibit (a) to the  Registrant's  Registration
               Statement on Form N-2, is incorporated herein by reference.

          3.   By-Laws of Registrant, which were filed electronically as exhibit
               (b) to the Registrant's  Registration  Statement on Form N-2, are
               incorporated herein by reference.


                                    SIGNATURE


     Pursuant to the  requirements of Section 12 of the Securities  Exchange Act
of 1934, the Registrant has duly caused this registration statement to be signed
on behalf of the undersigned, thereto duly authorized, this 20th day of January,
2005.


                                EATON VANCE SHORT DURATION
                                DIVERSIFIED INCOME FUND


                                By:     /s/ Thomas E. Faust Jr.
                                        ------------------------------------
                                        Name:  Thomas E. Faust Jr.
                                        Title:    President