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

                                    FORM 10-Q

[X]   QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934

                     For the period ended September 30, 2002

                                       OR

[_]   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934

              For the transition period from ________ to ________.

                         Commission File Number: 0-18147

                 DEAN WITTER REALTY INCOME PARTNERSHIP IV, L.P.
--------------------------------------------------------------------------------
         (Exact name of registrant as specified in governing instrument)

                 Delaware                                  13-3378315
         -----------------------               ---------------------------------
         (State of organization)               (IRS Employer Identification No.)

       195 Broadway, New York, NY                            10007
----------------------------------------                  ----------
(Address of principal executive offices)                  (Zip Code)

Registrant's telephone number, including area code: (800) 829-8585
                                                    --------------

Former name, former address and former fiscal year, if changed since last
report: not applicable

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days. Yes [X] No [_]

<PAGE>

                         PART I - FINANCIAL INFORMATION

Item I. Financial Statements

                 DEAN WITTER REALTY INCOME PARTNERSHIP IV, L.P.

                                 BALANCE SHEETS

                                                  September 30,    December 31,
                                                       2002            2001
                                                  -------------    ------------

                                     ASSETS

Cash and cash equivalents                         $     443,421    $    486,279
Investment in joint venture                             155,504          11,404
Other assets                                              9,958           9,958
                                                  -------------    ------------
                                                  $     608,883    $    507,641
                                                  =============    ============

                 LIABILITIES AND PARTNERS' CAPITAL (DEFICIENCY)

Accounts payable and accrued liabilities          $      50,444    $     52,025
Distributions payable to General Partners               175,615         175,615
                                                  -------------    ------------
                                                        226,059         227,640
                                                  =============    ============

Partners' capital (deficiency):
  General Partners                                   (5,566,513)     (5,576,795)
  Limited Partners ($500 per unit, 304,437
    Units issued and outstanding)                     5,949,337       5,856,796
                                                  -------------    ------------

                                                        382,824         280,001
                                                  -------------    ------------

                                                  $     608,883    $    507,641
                                                  =============    ============

                 See accompanying notes to financial statements.


                                       2
<PAGE>

                 DEAN WITTER REALTY INCOME PARTNERSHIP IV, L.P.

                            STATEMENTS OF OPERATIONS

             Three and nine months ended September 30, 2002 and 2001

<TABLE>
<CAPTION>
                                         Three months ended       Nine months ended
                                            September 30,           September 30,
                                          2002       2001         2002         2001
                                        --------   ---------    ---------    --------
<S>                                     <C>        <C>          <C>          <C>
Revenues:
  Equity in earnings of joint venture   $132,000   $      --    $ 144,100    $     --
  Interest and other                       1,420       3,131        4,040      20,952
                                        --------   ---------    ---------    --------
                                         133,420       3,131      148,140      20,952

Expenses:
  General and administrative              12,962     (15,210)      45,317      60,156
                                        --------   ---------    ---------    --------
Net income (loss)                       $120,458   $  18,341    $ 102,823    $(39,204)
                                        ========   =========    =========    ========

Net income (loss) allocated to:
  Limited Partners                      $108,412   $  16,507    $  92,541    $(35,284)
  General Partners                        12,046       1,834       10,282      (3,920)
                                        --------   ---------    ---------    --------
                                        $120,458   $  18,341    $ 102,823    $(39,204)
                                        ========   =========    =========    ========

Net income (loss) per Unit of limited
    partnership interest                $   0.35   $    0.05    $    0.30    $  (0.12)
                                        ========   =========    =========    ========
</TABLE>

               See accompanying notes to financial statements.


                                       3
<PAGE>

                 DEAN WITTER REALTY INCOME PARTNERSHIP IV, L.P.

                   STATEMENT OF PARTNERS' CAPITAL (DEFICIENCY)

                      Nine months ended September 30, 2002

                                             Limited       General
                                             Partners     Partners       Total
                                            ----------   -----------    --------
Partners' capital (deficiency) at
  January 1, 2002                           $5,856,796   $(5,576,795)   $280,001
Net income                                      92,541        10,282     102,823
                                            ----------   -----------    --------
Partners' capital (deficiency) at
  September 30, 2002                        $5,949,337   $(5,566,513)   $382,824
                                            ==========   ===========    ========

                 See accompanying notes to financial statements.


                                       4
<PAGE>

                 DEAN WITTER REALTY INCOME PARTNERSHIP IV, L.P.

                            STATEMENTS OF CASH FLOWS

                  Nine months ended September 30, 2002 and 2001

                                                          2002          2001
                                                       ---------    -----------
Cash flows from operating activities:
  Net income (loss)                                    $ 102,823    $   (39,204)
  Adjustments to reconcile net income (loss)
    to net cash used in operating activities:
      Equity in earnings of joint venture               (144,100)            --
      Decrease in other assets                                --         (8,313)
      Decrease in accounts payable and
        accrued liabilities                               (1,581)       (16,712)
                                                       ---------    -----------

          Net cash used in operating activities          (42,858)       (64,229)
                                                       ---------    -----------

Cash flows from financing activities:
  Distributions to partners                                   --       (969,679)
  Increase in distributions payable
    to General Partners                                       --         56,368
                                                       ---------    -----------

          Net cash used in financing activities               --       (913,311)

Decrease in cash and cash equivalents                    (42,858)      (977,540)

Cash and cash equivalents at beginning of period         486,279      1,542,591
                                                       ---------    -----------

Cash and cash equivalents at end of period             $ 443,421    $   565,051
                                                       =========    ===========

               See accompanying notes to financial statements.


                                       5
<PAGE>

                 DEAN WITTER REALTY INCOME PARTNERSHIP IV, L.P.

                          Notes to Financial Statements

1.    The Partnership

Dean Witter Realty Income Partnership IV, L.P. (the "Partnership") is a limited
partnership organized under the laws of the State of Delaware in 1986.

The Partnership's last remaining property investment was its 40.6% interest in
Taxter Park Associates ("TPA"), which owned Taxter Corporate Park. TPA sold the
Taxter property on May 23, 2000, and this sale has effectuated the dissolution
of the Partnership. However, the Partnership will not be able to wind up its
affairs and distribute the balance of the Partnership's cash reserves until TPA
terminates its operations (see Note 2). TPA now expects to terminate its
operations in December 2002, and accordingly, the Managing General Partner plans
to distribute the Partnership's remaining cash (including amounts expected to be
received from the termination of TPA) and terminate the Partnership before
December 31, 2002. If the Partnership is successful, these financial statements
will be the final financial statements issued by the Partnership.

The Partnership's interest in TPA is accounted for using the equity method.

The Partnership's records are maintained on the accrual basis of accounting for
financial and tax reporting purposes.

Net income (loss) per Unit of Limited Partnership interest amounts are
calculated by dividing net income (loss) allocated to Limited Partners, in
accordance with the Partnership Agreement, by the weighted average number of
Units outstanding.

In the opinion of management, the accompanying financial statements, which have
not been audited, include all adjustments, consisting only of normal recurring
accruals, necessary to present fairly the results for the interim period.

These financial statements should be read in conjunction with the annual
financial statements and notes thereto included in the Partnership's annual
report on Form 10-K filed with the Securities and Exchange Commission for the
year ended December 31, 2001. Operating results of interim periods may not be
indicative of the operating results for the entire year.


                                       6
<PAGE>

                 DEAN WITTER REALTY INCOME PARTNERSHIP IV, L.P.

                          Notes to Financial Statements

2.    Investment in Joint Venture

TPA appealed the amount of real estate taxes it was charged by the local taxing
authorities during the 1997 to 2000 tax years. TPA won a judgment in the Trial
Court during the second fiscal quarter of 2002; however, the taxing authorities
appealed the judgment. In September 2002, TPA and the taxing authorities settled
their dispute. TPA expects to receive the settlement amount (of which
approximately $132,000 is distributable to the Partnership) and terminate by
December 31, 2002.

3.    Related Party Transactions

An affiliate of the Managing General Partner performs administrative functions,
processes investor transactions and prepares tax information for the
Partnership. For the nine-month periods ended September 30, 2002 and 2001, the
Partnership incurred approximately $19,000 and $30,000, for these services,
respectively. These amounts are included in general and administrative expenses.

At September 30, 2002, the Partnership's accounts payable and accrued
liabilities included approximately $6,000 due to the above mentioned affiliate
for its third quarter 2002 services and $11,000 payable for the reimbursement of
expenses the affiliate paid on behalf of the Partnership.


                                       7
<PAGE>

                 DEAN WITTER REALTY INCOME PARTNERSHIP IV, L.P.

Item 2. Management's Discussion and Analysis of Financial Condition and Results
        of Operations

Liquidity and Capital Resources

As discussed in Note 1 to financial statements, Taxter Park Associates ("TPA"),
which owned the Taxter office property, sold the property on May 23, 2000. The
Partnership's 40.6% interest in TPA was the Partnership's only remaining
property interest. As a result of a settlement between TPA and the local taxing
authorities resolved in September 2002, TPA expects to receive a settlement, of
which approximately $132,000 is distributable to the Partnership. TPA expects to
distribute its remaining cash (to the Partnership and the other joint venturers)
and terminate by December 31, 2002. See Note 2 to the financial statements.

The Partnership dissolved pursuant to the terms of its Partnership Agreement,
effective May 23, 2000, the date on which the Taxter property was sold. The
Partnership plans to wind up its affairs, distribute its remaining cash reserves
(including amounts expected to be received from the termination of TPA) and
terminate its existence by filing a certificate of cancellation in the office of
the Delaware Secretary of State before December 31, 2002. The Managing General
Partner estimates that the Partnership's final cash distribution to be paid to
the Limited Partners will approximate $1.08 per Unit.

Except as discussed above and in the financial statements, the Managing General
Partner is not aware of any trends or events, commitments or uncertainties that
may have a material impact on liquidity.

Operations

Fluctuations in the Partnership's operating results for the three and nine month
periods ended September 30, 2002 compared to 2001 were primarily attributable to
the following:

The equity in earnings of joint venture amounts recognized in 2002 primarily
consists of the Partnership's share of the TPA settlement discussed above.
During the nine month period ended September 30, 2002, the equity in earnings of
joint venture also included the Partnership's share of Taxter tenant
receivables,


                                       8
<PAGE>

                 DEAN WITTER REALTY INCOME PARTNERSHIP IV, L.P.

collected by TPA during the second quarter of 2002, which had been previously
written off.

Interest and other revenues decreased in the 2002 periods compared to 2001
primarily due to a decrease in interest rates and a decline in average cash held
by the Partnership (in February 2001, the Partnership distributed over $910,000
to the Limited Partners).

General and administrative expenses decreased during the nine months ended
September 30, 2002 compared to 2001 primarily due to the decreased level of
Partnership activities while the Partnership winds up its affairs.

There were no other individually significant factors which caused changes in
revenues or expenses.

Inflation

Inflation has been consistently low during the periods presented in the
financial statements and, as a result, has not had a significant effect on the
operations of the Partnership.

Item 3. Quantitative and Qualitative Disclosure About Market Risk

Market risk refers to the risk that a change in the level of one or more market
prices, rates, indices, volatilities, correlations or other market factors, such
as liquidity, will result in losses for a position or portfolio.

Other than the Partnership's interest in TPA, the Partnership's assets consist
of cash and short-term time deposits. The Partnership does not hold any
instruments for trading purposes. The Partnership's liabilities consist of
accounts payable and other short-term liabilities. At September 30, 2002, the
Partnership had no material exposure to market risk. It also does not hold any
derivative securities. The Partnership's exposure to market risk as of September
30, 2002, and during the three-month and nine-month periods ending September 30,
2002, did not change materially compared to the Partnership's exposure to market
risk as of September 30, 2001, and during the three-month and nine-month periods
ending September 30, 2001.


                                       9
<PAGE>

                 DEAN WITTER REALTY INCOME PARTNERSHIP IV, L.P.

Item 4. CONTROLS AND PROCEDURES

Based upon their evaluation, as of a date within 90 days of the filing of this
Form 10-Q, the Chairman and Chief Executive Officer and the Vice President and
Principal Financial Officer of the Managing General Partner have concluded that
the Partnership's disclosure controls and procedures (as defined in Rules 13a-14
and 15d-14 under the Securities Exchange Act of 1934) are effective. There have
been no significant changes in internal controls or in other factors that could
significantly affect these controls subsequent to the date of their evaluation,
including any corrective actions with regard to significant deficiencies and
material weaknesses.


                                       10
<PAGE>

                 DEAN WITTER REALTY INCOME PARTNERSHIP IV, L.P.

PART II - OTHER INFORMATION

Item 6. Exhibits and Reports on Form 8-K.

      a)    Exhibits.

            (99.1) Certification of Periodic Report by William B. Smith,
                   Chairman and Chief Executive Officer of Dean Witter Realty
                   Fourth Income Properties Inc., the Managing General Partner
                   of Dean Witter Realty Income Partnership IV, L.P.

            (99.2) Certification of Periodic Report by Jeffrey D. Hahn, Vice
                   President and Principal Financial and Accounting Officer of
                   Dean Witter Realty Fourth Income Properties Inc., the
                   Managing General Partner of Dean Witter Realty Income
                   Properties IV, L.P.

      b)    Reports on Form 8-K. Report on Form 8-K dated September 16, 2002
            disclosing the settlement of the real estate tax dispute involving
            the Taxter property.


                                       11
<PAGE>

                 DEAN WITTER REALTY INCOME PARTNERSHIP IV, L.P.

                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                        DEAN WITTER REALTY INCOME
                                        PARTNERSHIP IV, L.P.

                                        By: Dean Witter Realty Fourth
                                            Income Properties Inc.
                                            Managing General Partner


Date:   November 14, 2002           By: /s/ William B. Smith
                                        ----------------------------------------
                                            William B. Smith
                                            Chairman and Chief Executive
                                            Officer


Date:   November 14, 2002           By: /s/ Jeffrey D. Hahn
                                        ----------------------------------------
                                            Jeffrey D. Hahn
                                            Vice President and
                                            Principal Financial and
                                            Accounting Officer


                                       12
<PAGE>

                                 CERTIFICATIONS

I, William B. Smith, Chairman and Chief Executive Officer of Dean Witter Realty
Fourth Income Properties Inc., the Managing General Partner of the Partnership,
certify that:

1.    I have reviewed this quarterly report on Form 10-Q of the Partnership;

2.    Based on my knowledge, this quarterly report does not contain any untrue
      statement of a material fact or omit to state a material fact necessary to
      make the statements made, in light of the circumstances under which such
      statements were made, not misleading with respect to the period covered by
      this quarterly report;

3.    Based on my knowledge, the financial statements, and other financial
      information included in this quarterly report, fairly present in all
      material respects the financial condition, results of operations and cash
      flows of the Partnership as of, and for, the periods presented in this
      quarterly report;

4.    The Partnership's other certifying officer and I are responsible for
      establishing and maintaining disclosure controls and procedures (as
      defined in Exchange Act Rules 13a-14 and 15d-14) for the Partnership and
      we have:

      a)    designed such disclosure controls and procedures to ensure that
            material information relating to the Partnership is made known to us
            by others within those entities, particularly during the period in
            which this quarterly report is being prepared;

      b)    evaluated the effectiveness of the Partnership's disclosure controls
            and procedures as of a date within 90 days prior to the filing date
            of this quarterly report (the "Evaluation Date"); and

      c)    presented in this quarterly report our conclusions about the
            effectiveness of the disclosure controls and procedures based on our
            evaluation as of the Evaluation Date;

5.    The Partnership's other certifying officer and I have disclosed, based on
      our most recent evaluation, to the Partnership's auditors and the audit
      committee of the Partnership's board of directors (or persons performing
      the equivalent function):


                                       13
<PAGE>

      a)    all significant deficiencies in the design or operation of internal
            controls which could adversely affect the Partnership's ability to
            record, process, summarize and report financial data and have
            identified for the Partnership's auditors any material weaknesses in
            internal controls; and

      b)    any fraud, whether or not material, that involves management or
            other employees who have a significant role in the Partnership's
            internal controls; and

6.    The Partnership's other certifying officer and I have indicated in this
      quarterly report whether or not there were significant changes in internal
      controls or in other factors that could significantly affect internal
      controls subsequent to the date of our most recent evaluation, including
      any corrective actions with regard to significant deficiencies and
      material weaknesses.


Date:   November 14, 2002               /s/ William B. Smith
                                        ----------------------------------------
                                        William B. Smith
                                        Chairman and Chief Executive
                                        Officer, Dean Witter Realty
                                        Fourth Income Properties Inc.,
                                        Managing General Partner of the
                                        Partnership


                                       14
<PAGE>

I, Jeffrey D. Hahn, Vice President and Principal Financial and Accounting
Officer of Dean Witter Realty Fourth Income Properties Inc., the Managing
General Partner of the Partnership, certify that:

1.    I have reviewed this quarterly report on Form 10-Q of the Partnership;

2.    Based on my knowledge, this quarterly report does not contain any untrue
      statement of a material fact or omit to state a material fact necessary to
      make the statements made, in light of the circumstances under which such
      statements were made, not misleading with respect to the period covered by
      this quarterly report;

3.    Based on my knowledge, the financial statements, and other financial
      information included in this quarterly report, fairly present in all
      material respects the financial condition, results of operations and cash
      flows of the Partnership as of, and for, the periods presented in this
      quarterly report;

4.    The Partnership's other certifying officer and I are responsible for
      establishing and maintaining disclosure controls and procedures (as
      defined in Exchange Act Rules 13a-14 and 15d-14) for the Partnership and
      we have:

      a)    designed such disclosure controls and procedures to ensure that
            material information relating to the Partnership is made known to us
            by others within those entities, particularly during the period in
            which this quarterly report is being prepared;

      b)    evaluated the effectiveness of the Partnership's disclosure controls
            and procedures as of a date within 90 days prior to the filing date
            of this quarterly report (the "Evaluation Date"); and

      c)    presented in this quarterly report our conclusions about the
            effectiveness of the disclosure controls and procedures based on our
            evaluation as of the Evaluation Date;

5.    The Partnership's other certifying officer and I have disclosed, based on
      our most recent evaluation, to the Partnership's auditors and the audit
      committee of the Partnership's board of directors (or persons performing
      the equivalent function):


                                       15
<PAGE>

      a)    all significant deficiencies in the design or operation of internal
            controls which could adversely affect the Partnership's ability to
            record, process, summarize and report financial data and have
            identified for the Partnership's auditors any material weaknesses in
            internal controls; and

      b)    any fraud, whether or not material, that involves management or
            other employees who have a significant role in the Partnership's
            internal controls; and

6.    The Partnership's other certifying officer and I have indicated in this
      quarterly report whether or not there were significant changes in internal
      controls or in other factors that could significantly affect internal
      controls subsequent to the date of our most recent evaluation, including
      any corrective actions with regard to significant deficiencies and
      material weaknesses.


Date: November 14, 2002                 /s/Jeffrey D. Hahn
                                        ----------------------------------------
                                        Jeffrey D. Hahn
                                        Vice President and Principal Financial
                                        And Accounting Officer,
                                        Dean Witter Realty Fourth Income
                                        Properties, Inc., Managing
                                        General Partner of the Partnership


                                       16
<PAGE>

                 DEAN WITTER REALTY INCOME PARTNERSHIP IV, L.P.

                                  EXHIBIT INDEX

      99.1  Certification of Periodic Report by William B. Smith, Chairman and
            Chief Executive Officer of Dean Witter Realty Fourth Income
            Properties Inc., the Managing General Partner of the Partnership.

      99.2  Certification of Periodic Report by Jeffrey D. Hahn Vice President
            and Principal Financial and Accounting Officer of Dean Witter Realty
            Fourth Income Properties Inc., the Managing General Partner of the
            Partnership.


                                       17