EXHIBIT 32.1
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   Certification of Chief Executive Officer and Chief Financial Officer
                    Pursuant to 18 U.S.C. Section 1350,
                          As Adopted Pursuant to
               Section 906 of the Sarbanes-Oxley Act of 2002



In connection with the Quarterly Report of Jones Lang LaSalle Incorporated
(the Company) on Form 10-Q for the period ending June 30, 2004 as filed
with the Securities and Exchange Commission on the date hereof (the
Report), Stuart L. Scott, as Chief Executive Officer of the Company, and
Lauralee E. Martin, as Chief Financial Officer of the Company, hereby
certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002, to the best of their
knowledge, that:

      (1)   The Report fully complies with the requirements of section
            13(a) 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 Company.







/s/ Stuart L. Scott                      /s/ Lauralee E. Martin
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Stuart L. Scott                          Lauralee E. Martin
Chief Executive Officer,                 Executive Vice President and
President and Chairman of                Chief Financial Officer
the Board of Directors                   August 2, 2004
and Director
August 2, 2004




This certification accompanies the Report pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by
the Sarbanes-Oxley Act of 2002, be deemed filed by the Company for purposes
of Section 18 of the Securities Exchange Act of 1934, as amended.