EXHIBIT NUMBER (23)
                                                             TO 1999 FORM 10-K



                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

     As independent public accountants, we hereby consent to the incorporation
of our report dated January 18, 2000, incorporated by reference in the Northern
Trust Corporation's Annual Report on Form 10-K for the year end December 31,
1999, into the Corporation's previously filed Form S-8 Registration Statements
File Nos. 33-22546, 33-47597, 33-63843, 333-25283, 333-52623, 333-53259, 333-
74951, 333-84085; and the Corporation's previously filed Form S-3 Nos. 333-18951
and 333-25649.



                                       /s/ ARTHUR ANDERSEN LLP
                                       ---------------------------------
                                           ARTHUR ANDERSEN LLP


Chicago, Illinois
March 14, 2000