EXHIBIT 5.1
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                    Jones Lang LaSalle Incorporated
                        200 East Randolph Drive
                       Chicago, Illinois  60601




May 8, 2006



Ladies and Gentlemen:

     As Global General Counsel of Jones Lang LaSalle Incorporated (JLL), I
have acted as counsel to JLL in connection with the Registration Statement
on Form S-8 (the "Registration Statement") being filed with the Securities
and Exchange Commission in connection with the registration under the
Securities Act of 1933, as amended (the "Act") of 3,000,000 additional
shares of JLL's Common Stock under the Jones Lang LaSalle Incorporated
Amended and Restated Stock Award and Incentive Plan (the "Plan").  This
opinion is being furnished in accordance with the requirements of Item
601(b) (5) of Regulation S-K under the Act.

     In connection with the opinion set forth below, I have examined such
records and documents and have made such investigations of law and fact as
I have deemed necessary.

     Based upon and subject to the foregoing, I am of the opinion that the
shares of JLL Common Stock have been duly authorized by requisite corporate
action by JLL, and, when issued delivered and paid for in accordance with
the terms and conditions of the Plan, will be validly issued, fully paid
and nonassessable.

     I hereby consent to the filing of this legal opinion as an exhibit to
the Registration Statement.



Sincerely,


Mark J. Ohringer, Esq.
as Global General Counsel