Certification Pursuant to 18 U.S.C. Section 1350,
                             As Adopted Pursuant to
                  Section 906 of the Sarbanes-Oxley Act of 2002

Name of Issuer: Van Kampen Municipal Trust

      In connection with the Report on Form N-CSR (the "Report") of the
above-named issuer for the period ended October 31, 2005 that is accompanied by
this certification, the undersigned hereby certifies that:

1.    The Report fully complies with the requirements of Section 13(a) or 15(d)
      of the Securities Exchange Act of 1934; and

2.    The information contained in the Report fairly presents, in all material
      respects, the financial condition and results of operations of the Issuer.

Date: December 19, 2005

                                         /s/ Ronald E. Robison
                                         ---------------------------
                                         Ronald E. Robison
                                         Principal Executive Officer

A signed original of this written statement required by Section 906 has been
provided to Van Kampen Municipal Trust and will be retained by Van Kampen
Municipal Trust and furnished to the Securities and Exchange Commission or its
staff upon request. This written statement required by Section 906 is being
furnished with this report, but not being filed as part of this Report.



                Certification Pursuant to 18 U.S.C. Section 1350,
                             As Adopted Pursuant to
                  Section 906 of the Sarbanes-Oxley Act of 2002

Name of Issuer: Van Kampen Municipal Trust

      In connection with the Report on Form N-CSR (the "Report") of the
above-named issuer for the period ended October 31, 2005 that is accompanied by
this certification, the undersigned hereby certifies that:

1.    The Report fully complies with the requirements of Section 13(a) or 15(d)
      of the Securities Exchange Act of 1934; and

2.    The information contained in the Report fairly presents, in all material
      respects, the financial condition and results of operations of the Issuer.

Date: December 19, 2005

                                         /s/ Phillip G. Goff
                                         ---------------------------
                                         Phillip G. Goff
                                         Principal Financial Officer

A signed original of this written statement required by Section 906 has been
provided to Van Kampen Municipal Trust and will be retained by Van Kampen
Municipal Trust and furnished to the Securities and Exchange Commission or its
staff upon request. This written statement required by Section 906 is being
furnished with this report, but not being filed as part of this Report.