POWER OF ATTORNEY



 Know all by these presents, that, effective as of November 10, 2007, the undersigned

hereby constitutes and appoints each of: Dana I. Green, Allan M. Resnick, Oren B. Azar,

Leanne Ebert Murphy and Joshua R. Markus, respectively, signing singly, the undersigned's

true and lawful attorney-in-fact, with full power of substitution and resubstitution, to:



(1) prepare, execute in the undersigned's name and on the undersigned's

behalf, and submit to the U.S. Securities and Exchange Commission (the

"SEC") a Form ID, including amendments thereto, and any other documents

necessary or appropriate to obtain codes and passwords enabling the

undersigned to make electronic filings with the SEC of reports required by

Section 16(a) of the Securities Exchange Act of 1934 or any rule or regulation

of the SEC;



(2) execute for and on behalf of the undersigned, in the undersigned's

capacity as an officer and/or Member of the Board of Directors of Walgreen

Co. (the "Company"), Forms 3, 4, and 5 in accordance with Section 16(a) of

the Securities Exchange Act of 1934 and the rules and regulations thereunder;



(3) do and perform any and all acts for and on behalf of the undersigned

which may be necessary or desirable to complete and execute any such Form

3, 4, or 5, complete and execute any amendment or amendments thereto, and

file such form with the SEC and any stock exchange or similar authority; and



(4) take any other action of any type whatsoever in connection with the

foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in

the best interest of, or legally required by, the undersigned, it being

understood that the documents executed by such attorney-in-fact on behalf of

the undersigned pursuant to this Power of Attorney shall be in such form and

shall contain such terms and conditions as such attorney-in-fact may approve

in such attorney-in-fact's discretion.



 The undersigned hereby grants to each such attorney-in-fact full power and authority

to do and perform any and every act and thing whatsoever requisite, necessary, or proper to

be done in the exercise of any of the rights and powers herein granted, as fully to all intents

and purposes as the undersigned might or could do if personally present, with full power of

substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or

such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be done by

virtue of this Power of Attorney and the rights and powers herein granted.  The undersigned

acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request

of the undersigned, are not assuming, nor is the Company assuming, any of the

undersigned's responsibilities to comply with Section 16 of the Securities Exchange Act of

1934.



 This Power of Attorney shall remain in full force and effect until the undersigned is no

longer required to file Forms 3, 4, and 5 with respect to the undersigned's holdings of, and

transactions in, securities issued by the Company, unless earlier revoked by the undersigned

in a signed writing delivered to the foregoing attorneys-in-fact.









 IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be

executed as of this 10 day of November, 2007.









/s/ Kevin Walgreen

       Signature







Kevin Walgreen

       Print Name