================================================================================

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D
                                 (Rule 13d-101)
                               (Amendment No. 25)


             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
            TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO
                                  RULE 13d-2(a)


                              The Korea Fund, Inc.
                              --------------------
                                (Name of Issuer)

                     Common Stock, par value $.01 per share
                     --------------------------------------
                         (Title of Class of Securities)

                                    500634100
                                    ---------
                                 (CUSIP Number)

                                 Barry M. Olliff
                                 ---------------
            c/o City of London Investment Management Company Limited
                     10 Eastcheap, London EC3M ILX, England
                                +44 207 711 0771
                                ----------------
           (Name, Address and Telephone Number of Person Authorized to
                       Receive Notices and Communications)

                                 April 30, 2008
                                 --------------
             (Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(e), (f) or (g), check the following box / /.

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 or otherwise subject to the liabilities of that section of the Act but
shall be subject to all other provisions of the Act.
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===================                                                  ===========
CUSIP NO. 500634100                     13D                          PAGE 2 of 6
===================                                                  ===========
================================================================================
     1       NAME OF REPORTING PERSONS
             S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

             City of London Investment Group PLC, a company incorporated under
             the laws of England and Wales.
------------ -------------------------------------------------------------------
     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP            (A) |_|
                                                                         (B) |_|
------------ -------------------------------------------------------------------
     3       SEC USE ONLY

------------ -------------------------------------------------------------------
     4       SOURCE OF FUNDS*

             OO
------------ -------------------------------------------------------------------
     5       CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
             TO ITEM 2(d) OR 2(e)
                                                                             |_|
------------ -------------------------------------------------------------------
     6       CITIZENSHIP OR PLACE OF ORGANIZATION

             England and Wales
--------------------------------------------------------------------------------
                          7    SOLE VOTING POWER
      NUMBER OF
        SHARES                 1,561,335
     BENEFICIALLY       ------ -------------------------------------------------
       OWNED BY           8    SHARED VOTING POWER
         EACH
      REPORTING                0
        PERSON          ------ -------------------------------------------------
         WITH             9    SOLE DISPOSITIVE POWER

                               1,561,335
                        ------ -------------------------------------------------
                         10    SHARED DISPOSITIVE POWER

                               0
------------ -------------------------------------------------------------------
    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

             1,561,335
------------ -------------------------------------------------------------------
    12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
             SHARES
                                                                             |_|
------------ -------------------------------------------------------------------
    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

             6.40%
------------ -------------------------------------------------------------------
    14       TYPE OF REPORTING PERSON*

             HC
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===================                                                  ===========
CUSIP NO. 500634100                     13D                          PAGE 3 of 6
===================                                                  ===========
================================================================================
     1       NAME OF REPORTING PERSONS
             S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

             City of London Investment Management Company Limited, a company
             incorporated under the laws of England and Wales.
------------ -------------------------------------------------------------------
     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP            (A) |_|
                                                                         (B) |_|
------------ -------------------------------------------------------------------
     3       SEC USE ONLY

------------ -------------------------------------------------------------------
     4       SOURCE OF FUNDS*

             WC
------------ -------------------------------------------------------------------
     5       CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
             TO ITEM 2(D) OR 2(E)
                                                                             |_|
------------ -------------------------------------------------------------------
     6       CITIZENSHIP OR PLACE OF ORGANIZATION

             England and Wales
--------------------------------------------------------------------------------
                          7    SOLE VOTING POWER
      NUMBER OF
        SHARES                 1,561,335
     BENEFICIALLY       ------ -------------------------------------------------
       OWNED BY           8    SHARED VOTING POWER
         EACH
      REPORTING                0
        PERSON          ------ -------------------------------------------------
         WITH             9    SOLE DISPOSITIVE POWER

                               1,561,335
                        ------ -------------------------------------------------
                         10    SHARED DISPOSITIVE POWER

                               0
------------ -------------------------------------------------------------------
    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

             1,561,335
------------ -------------------------------------------------------------------
    12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
             SHARES
                                                                             |_|
------------ -------------------------------------------------------------------
    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

             6.40%
------------ -------------------------------------------------------------------
    14       TYPE OF REPORTING PERSON*

             IA
================================================================================


This Amendment No. 25 to Schedule 13D (this "Amendment No. 24") should be read
in conjunction with the Schedule 13D filed with the U.S. Securities and Exchange
Commission (the "SEC") on February 17, 2004 (the "Original Schedule 13D"), with
Amendment No. 1 to Schedule 13D filed with the SEC on March 1, 2004 ("Amendment
No. 1"), with Amendment No. 2 to Schedule 13D filed with the SEC on May 5, 2004
("Amendment No. 2"), with Amendment No. 3 to Schedule 13D filed with the SEC on
July 8, 2004 ("Amendment No. 3"), with Amendment No. 4 to Schedule 13D filed
with the SEC on August 31, 2004 ("Amendment No. 4"), with Amendment No. 5 to
Schedule 13D filed with the SEC on November 15, 2004 ("Amendment No. 5"), with
Amendment No. 6 to Schedule 13D filed with the SEC on December 23, 2004
("Amendment No. 6"), with Amendment No. 7 to Schedule 13D filed with the SEC on
May 18, 2005 ("Amendment No. 7"), with Amendment No. 8 to Schedule 13D filed
with the SEC on June 10, 2005 ("Amendment No. 8"), with Amendment No. 9 to
Schedule 13D filed with the SEC on July 5, 2005 ("Amendment No. 9"), with
Amendment No. 10 to Schedule 13D filed with the SEC on August 5, 2005
("Amendment No. 10"), with Amendment No. 11 to Schedule 13D filed with the SEC
on August 12, 2005 ("Amendment No. 11"), with Amendment No. 12 to Schedule 13D
filed with the SEC on September 14, 2005 ("Amendment No. 12"), with Amendment
No. 13 to Schedule 13D filed with the SEC on October 7, 2005 ("Amendment No.
13"), with Amendment No. 14 to Schedule 13D filed with the SEC on October 21,
2005 ("Amendment No. 14"), and with Amendment No. 15 to Schedule 13D filed with
the SEC on April 10, 2006 ("Amendment No. 15"), and with Amendment No. 16 to
Schedule 13D filed with the SEC on June 9, 2006 ("Amendment No. 16"), and with
Amendment No. 17 to Schedule 13D filed with the SEC on October 18, 2006
("Amendment No. 17"), and with Amendment No. 18 to Schedule 13D filed with the
SEC on November 8,2006 ("Amendment No. 18"), and with Amendment No. 19 to
Schedule 13D filed with the SEC on December 1 , 2006 ("Amendment No. 19"), and
with Amendment No. 20 to Schedule 13D filed with the SEC on July 9, 2007
("Amendment No. 20"), and with Amendment No. 21 to Schedule 13D filed with the
SEC on August 9, 2007 ("Amendment No. 21"), and with Amendment No. 22 to
Schedule 13D filed with the SEC on November 7, 2007 ("Amendment No. 22"), and
with Amendment No. 23 to Schedule 13D filed with the SEC on January 9, 2008
("Amendment No. 23"), and with Amendment No. 24 to Schedule 13D filed with the
SEC on April 9, 2008 ("Amendment No. 24"), and, together with Amendment No. 1,
Amendment No. 2, Amendment No. 3, Amendment No. 4, Amendment No. 5, Amendment
No. 6, Amendment No. 7, Amendment No. 8, Amendment No. 9. Amendment No. 10,
Amendment No. 11, Amendment No. 12, Amendment No. 13, Amendment No. 14,
Amendment No. 15, Amendment No. 16, Amendment No. 17, Amendment 18, Amendment
No. 19, Amendment No. 20 , Amendment No. 21, Amendment No. 22 , Amendment No.
23, Amendment No. 24 and, Amendment No. 25 ( the "Amendments"), by City of
London Investment Group PLC ("City of London") and City of London Investment
Management Company Limited relating to the shares of common stock, par value
$0.01 per share (the "Shares"), of The Korea Fund, Inc., a Maryland corporation
(the "Fund"). This Amendment No. 24 amends Item 5 of the Original Schedule 13D
as amended by the Amendments. All other information in the Original Schedule 13D
and the Amendments remains in effect. All capitalized terms used herein and not
otherwise defined shall have the meanings ascribed thereto in the Original
Schedule 13D as amended by the Amendments.

ITEM 5.          INTERESTS IN SECURITIES OF THE ISSUER.

                 Items 5(a) and 5(b) below are hereby amended and restated in
                 their entirety and Item 5(c) is hereby amended as follows:

                               (Page 4 of 6 Pages)


                 (a) and (b). As of the date hereof, GEM, IEM, EWF, GFM, FREE,
                 CEM and Accounts owned directly 231,034, 355,071, 146,171,
                 30,879, 359,315, 162, and 438,703 Shares, respectively,
                 representing approximately 0.95%, 1.46%, 0.60%, 0.13%, 1.47%,
                 0.001% and 1.80%, respectively, of the Shares outstanding
                 (based on the most recent Share information publicly disclosed
                 by the Fund).

                 As of the date hereof, CLIG, through its control of CLIM, is
                 the beneficial owner of 1,561,335 Shares, representing
                 approximately 6.40% of the Shares outstanding (based on the
                 most recent Share information publicly disclosed by the Fund).

                 As of the date hereof, CLIM, through GEM, IEM, EWF, GFM, FREE,
                 CEM and Accounts, is the beneficial owner 1,561,335 Shares,
                 representing approximately 6.40% of the Shares outstanding
                 (based on the most recent Share information publicly disclosed
                 by the Fund).

                 (c). Except as described below, no transactions in the Shares
                 were effected by the Reporting Persons, or, to their knowledge,
                 any of the persons identified in Item 2, since the last filing.


--------------------------------------------------------------------------------
PORTFOLIO         TRADE DATE     TRAN TYPE      PAR VALUE/SHARES     TRADE PRICE
--------------------------------------------------------------------------------
Account            4/8/2008         Sell              12,500            24.5386
--------------------------------------------------------------------------------
GEM                4/8/2008         Sell              23,300            24.5386
--------------------------------------------------------------------------------
CEM                4/9/2008         Sell                 100             24.277
--------------------------------------------------------------------------------
GEM                4/9/2008         Sell              24,900             24.277
--------------------------------------------------------------------------------
Account           4/10/2008         Sell              34,200            24.5241
--------------------------------------------------------------------------------
Account           4/11/2008         Sell              13,100            24.5333
--------------------------------------------------------------------------------
Account           4/15/2008         Sell              75,000            24.0406
--------------------------------------------------------------------------------
Account           4/16/2008         Sell              50,000            24.4817
--------------------------------------------------------------------------------
EWF               4/17/2008         Sell               4,300            24.4509
--------------------------------------------------------------------------------
Account           4/18/2008         Sell               7,800            24.5387
--------------------------------------------------------------------------------
FREE              4/18/2008         Sell              15,600            24.5387
--------------------------------------------------------------------------------
GEM               4/18/2008         Sell              15,600            24.5387
--------------------------------------------------------------------------------
GEM               4/22/2008         Sell             220,204            25.2840
--------------------------------------------------------------------------------
IEM               4/22/2008         Sell             338,427            25.2840
--------------------------------------------------------------------------------
FREE              4/22/2008         Sell             342,472            25.2840
--------------------------------------------------------------------------------
EWF               4/22/2008         Sell             139,320            25.2840
--------------------------------------------------------------------------------
GFM               4/22/2008         Sell              29,432            25.2840
--------------------------------------------------------------------------------
Account           4/22/2008         Sell             418,140            25.2840
--------------------------------------------------------------------------------
CEM               4/22/2008         Sell                 154            25.2840
--------------------------------------------------------------------------------

                               (Page 5 of 6 Pages)


                                    SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Dated: May 9, 2008

                                     CITY OF LONDON INVESTMENT GROUP PLC


                                     /s/ Barry M. Olliff
                                     ---------------------------
                                     Name: Barry M. Olliff
                                     Title: Director


                                     CITY OF LONDON INVESTMENT MANAGEMENT
                                     COMPANY LIMITED


                                     /s/ Barry M. Olliff
                                     ---------------------------
                                     Name: Barry M. Olliff
                                     Title: Director



                               (Page 6 of 6 Pages)