EXHIBIT 24.0
 
                               POWER OF ATTORNEY
 
  Whereas, Arthur J. Gallagher & Co., a Delaware corporation (the "Company"),
has prepared and proposes to file with the Securities and Exchange Commission
(the "Commission") under the provisions of the Securities Act of 1933, as
amended (the "Act"), and the rules and regulations promulgated thereunder, a
Registration Statement on Form S-8 (the "Registration Statement"), relating to
the offer and sale of up to 769,000 shares of Common Stock, $1.00 par value, of
the Company pursuant to options granted under the Company's 1988 Nonqualified
Stock Option Plan and 1989 Non-Employee Directors' Stock Option Plan subject to
adjustment as therein provided; and
 
  Whereas, the Company may from time to time file with the Commission under the
provisions of the Act and the rules and regulations promulgated thereunder
Appendices, Amendments and Post-Effective Amendments to the Registration
Statement;
 
  Now, Therefore, the undersigned hereby:
 
    (1) designates, constitutes and appoints Carl E. Fasig, Counsel and
  Secretary of the Company, his attorney, with full power to act for and on
  behalf of the undersigned in connection with, and to sign the name of the
  undersigned in his capacity as a Director of the Company to the
  Registration Statement and to any and all Appendices, Amendments and Post-
  Effective Amendments to the Registration Statement which the Company may
  hereafter file with the Commission under the provisions of the Act and the
  rules and regulations promulgated thereunder; and
 
    (2) ratifies, confirms and approves any and all acts and things which
  Carl E. Fasig may lawfully take or do, or cause to be taken or done, by
  virtue of the powers granted to him hereunder.
 
  In Witness Whereof, the undersigned has hereunto set his hand this 12th day
of June, 1996.
 
 
                                          -------------------------------------
                                                   Robert E. Gallagher

 
                               POWER OF ATTORNEY
 
  Whereas, Arthur J. Gallagher & Co., a Delaware corporation (the "Company"),
has prepared and proposes to file with the Securities and Exchange Commission
(the "Commission") under the provisions of the Securities Act of 1933, as
amended (the "Act"), and the rules and regulations promulgated thereunder, a
Registration Statement on Form S-8 (the "Registration Statement"), relating to
the offer and sale of up to 769,000 shares of Common Stock, $1.00 par value, of
the Company pursuant to options granted under the Company's 1988 Nonqualified
Stock Option Plan and 1989 Non-Employee Directors' Stock Option Plan subject to
adjustment as therein provided; and
 
  Whereas, the Company may from time to time file with the Commission under the
provisions of the Act and the rules and regulations promulgated thereunder
Appendices, Amendments and Post-Effective Amendments to the Registration
Statement;
 
  Now, Therefore, the undersigned hereby:
 
    (1) designates, constitutes and appoints Carl E. Fasig, Counsel and
  Secretary of the Company, his attorney, with full power to act for and on
  behalf of the undersigned in connection with, and to sign the name of the
  undersigned in his capacity as a Director of the Company to the
  Registration Statement and to any and all Appendices, Amendments and Post-
  Effective Amendments to the Registration Statement which the Company may
  hereafter file with the Commission under the provisions of the Act and the
  rules and regulations promulgated thereunder; and
 
    (2) ratifies, confirms and approves any and all acts and things which
  Carl E. Fasig may lawfully take or do, or cause to be taken or done, by
  virtue of the powers granted to him hereunder.
 
  In Witness Whereof, the undersigned has hereunto set his hand this 12th day
of June, 1996.
 
 
                                          -------------------------------------
                                                   T. Kimball Brooker

 
                               POWER OF ATTORNEY
 
  Whereas, Arthur J. Gallagher & Co., a Delaware corporation (the "Company"),
has prepared and proposes to file with the Securities and Exchange Commission
(the "Commission") under the provisions of the Securities Act of 1933, as
amended (the "Act"), and the rules and regulations promulgated thereunder, a
Registration Statement on Form S-8 (the "Registration Statement"), relating to
the offer and sale of up to 769,000 shares of Common Stock, $1.00 par value, of
the Company pursuant to options granted under the Company's 1988 Nonqualified
Stock Option Plan and 1989 Non-Employee Directors' Stock Option Plan subject to
adjustment as therein provided; and
 
  Whereas, the Company may from time to time file with the Commission under the
provisions of the Act and the rules and regulations promulgated thereunder
Appendices, Amendments and Post-Effective Amendments to the Registration
Statement;
 
  Now, Therefore, the undersigned hereby:
 
    (1) designates, constitutes and appoints Carl E. Fasig, Counsel and
  Secretary of the Company, his attorney, with full power to act for and on
  behalf of the undersigned in connection with, and to sign the name of the
  undersigned in his capacity as a Director of the Company to the
  Registration Statement and to any and all Appendices, Amendments and Post-
  Effective Amendments to the Registration Statement which the Company may
  hereafter file with the Commission under the provisions of the Act and the
  rules and regulations promulgated thereunder; and
 
    (2) ratifies, confirms and approves any and all acts and things which
  Carl E. Fasig may lawfully take or do, or cause to be taken or done, by
  virtue of the powers granted to him hereunder.
 
  In Witness Whereof, the undersigned has hereunto set his hand this 12th day
of June, 1996.
 
 
                                          -------------------------------------
                                                    John G. Campbell

 
                               POWER OF ATTORNEY
 
  Whereas, Arthur J. Gallagher & Co., a Delaware corporation (the "Company"),
has prepared and proposes to file with the Securities and Exchange Commission
(the "Commission") under the provisions of the Securities Act of 1933, as
amended (the "Act"), and the rules and regulations promulgated thereunder, a
Registration Statement on Form S-8 (the "Registration Statement"), relating to
the offer and sale of up to 769,000 shares of Common Stock, $1.00 par value, of
the Company pursuant to options granted under the Company's 1988 Nonqualified
Stock Option Plan and 1989 Non-Employee Directors' Stock Option Plan subject to
adjustment as therein provided; and
 
  Whereas, the Company may from time to time file with the Commission under the
provisions of the Act and the rules and regulations promulgated thereunder
Appendices, Amendments and Post-Effective Amendments to the Registration
Statement;
 
  Now, Therefore, the undersigned hereby:
 
    (1) designates, constitutes and appoints Carl E. Fasig, Counsel and
  Secretary of the Company, his attorney, with full power to act for and on
  behalf of the undersigned in connection with, and to sign the name of the
  undersigned in his capacity as a Director of the Company to the
  Registration Statement and to any and all Appendices, Amendments and Post-
  Effective Amendments to the Registration Statement which the Company may
  hereafter file with the Commission under the provisions of the Act and the
  rules and regulations promulgated thereunder; and
 
    (2) ratifies, confirms and approves any and all acts and things which
  Carl E. Fasig may lawfully take or do, or cause to be taken or done, by
  virtue of the powers granted to him hereunder.
 
  In Witness Whereof, the undersigned has hereunto set his hand this 12th day
of June, 1996.
 
 
                                          -------------------------------------
                                                    Jack M. Greenberg

 
                               POWER OF ATTORNEY
 
  Whereas, Arthur J. Gallagher & Co., a Delaware corporation (the "Company"),
has prepared and proposes to file with the Securities and Exchange Commission
(the "Commission") under the provisions of the Securities Act of 1933, as
amended (the "Act"), and the rules and regulations promulgated thereunder, a
Registration Statement on Form S-8 (the "Registration Statement"), relating to
the offer and sale of up to 769,000 shares of Common Stock, $1.00 par value, of
the Company pursuant to options granted under the Company's 1988 Nonqualified
Stock Option Plan and 1989 Non-Employee Directors' Stock Option Plan subject to
adjustment as therein provided; and
 
  Whereas, the Company may from time to time file with the Commission under the
provisions of the Act and the rules and regulations promulgated thereunder
Appendices, Amendments and Post-Effective Amendments to the Registration
Statement;
 
  Now, Therefore, the undersigned hereby:
 
    (1) designates, constitutes and appoints Carl E. Fasig, Counsel and
  Secretary of the Company, his attorney, with full power to act for and on
  behalf of the undersigned in connection with, and to sign the name of the
  undersigned in his capacity as a Director of the Company to the
  Registration Statement and to any and all Appendices, Amendments and Post-
  Effective Amendments to the Registration Statement which the Company may
  hereafter file with the Commission under the provisions of the Act and the
  rules and regulations promulgated thereunder; and
 
    (2) ratifies, confirms and approves any and all acts and things which
  Carl E. Fasig may lawfully take or do, or cause to be taken or done, by
  virtue of the powers granted to him hereunder.
 
  In Witness Whereof, the undersigned has hereunto set his hand this 12th day
of June, 1996.
 
 
                                          -------------------------------------
                                                 Frank M. Heffernan, Jr.

 
                               POWER OF ATTORNEY
 
  Whereas, Arthur J. Gallagher & Co., a Delaware corporation (the "Company"),
has prepared and proposes to file with the Securities and Exchange Commission
(the "Commission") under the provisions of the Securities Act of 1933, as
amended (the "Act"), and the rules and regulations promulgated thereunder, a
Registration Statement on Form S-8 (the "Registration Statement"), relating to
the offer and sale of up to 769,000 shares of Common Stock, $1.00 par value, of
the Company pursuant to options granted under the Company's 1988 Nonqualified
Stock Option Plan and 1989 Non-Employee Directors' Stock Option Plan subject to
adjustment as therein provided; and
 
  Whereas, the Company may from time to time file with the Commission under the
provisions of the Act and the rules and regulations promulgated thereunder
Appendices, Amendments and Post-Effective Amendments to the Registration
Statement;
 
  Now, Therefore, the undersigned hereby:
 
    (1) designates, constitutes and appoints Carl E. Fasig, Counsel and
  Secretary of the Company, his attorney, with full power to act for and on
  behalf of the undersigned in connection with, and to sign the name of the
  undersigned in his capacity as a Director of the Company to the
  Registration Statement and to any and all Appendices, Amendments and Post-
  Effective Amendments to the Registration Statement which the Company may
  hereafter file with the Commission under the provisions of the Act and the
  rules and regulations promulgated thereunder; and
 
    (2) ratifies, confirms and approves any and all acts and things which
  Carl E. Fasig may lawfully take or do, or cause to be taken or done, by
  virtue of the powers granted to him hereunder.
 
  In Witness Whereof, the undersigned has hereunto set his hand this 12th day
of June, 1996.
 
 
                                          -------------------------------------
                                                   Phillip A. Marineau

 
                               POWER OF ATTORNEY
 
  Whereas, Arthur J. Gallagher & Co., a Delaware corporation (the "Company"),
has prepared and proposes to file with the Securities and Exchange Commission
(the "Commission") under the provisions of the Securities Act of 1933, as
amended (the "Act"), and the rules and regulations promulgated thereunder, a
Registration Statement on Form S-8 (the "Registration Statement"), relating to
the offer and sale of up to 769,000 shares of Common Stock, $1.00 par value, of
the Company pursuant to options granted under the Company's 1988 Nonqualified
Stock Option Plan and 1989 Non-Employee Directors' Stock Option Plan subject to
adjustment as therein provided; and
 
  Whereas, the Company may from time to time file with the Commission under the
provisions of the Act and the rules and regulations promulgated thereunder
Appendices, Amendments and Post-Effective Amendments to the Registration
Statement;
 
  Now, Therefore, the undersigned hereby:
 
    (1) designates, constitutes and appoints Carl E. Fasig, Counsel and
  Secretary of the Company, his attorney, with full power to act for and on
  behalf of the undersigned in connection with, and to sign the name of the
  undersigned in his capacity as a Director of the Company to the
  Registration Statement and to any and all Appendices, Amendments and Post-
  Effective Amendments to the Registration Statement which the Company may
  hereafter file with the Commission under the provisions of the Act and the
  rules and regulations promulgated thereunder; and
 
    (2) ratifies, confirms and approves any and all acts and things which
  Carl E. Fasig may lawfully take or do, or cause to be taken or done, by
  virtue of the powers granted to him hereunder.
 
  In Witness Whereof, the undersigned has hereunto set his hand this 12th day
of June, 1996.
 
 
                                          -------------------------------------
                                                   Walter F. Mc Clure

 
                               POWER OF ATTORNEY
 
  Whereas, Arthur J. Gallagher & Co., a Delaware corporation (the "Company"),
has prepared and proposes to file with the Securities and Exchange Commission
(the "Commission") under the provisions of the Securities Act of 1933, as
amended (the "Act"), and the rules and regulations promulgated thereunder, a
Registration Statement on Form S-8 (the "Registration Statement"), relating to
the offer and sale of up to 769,000 shares of Common Stock, $1.00 par value, of
the Company pursuant to options granted under the Company's 1988 Nonqualified
Stock Option Plan and 1989 Non-Employee Directors' Stock Option Plan subject to
adjustment as therein provided; and
 
  Whereas, the Company may from time to time file with the Commission under the
provisions of the Act and the rules and regulations promulgated thereunder
Appendices, Amendments and Post-Effective Amendments to the Registration
Statement;
 
  Now, Therefore, the undersigned hereby:
 
    (1) designates, constitutes and appoints Carl E. Fasig, Counsel and
  Secretary of the Company, his attorney, with full power to act for and on
  behalf of the undersigned in connection with, and to sign the name of the
  undersigned in his capacity as a Director of the Company to the
  Registration Statement and to any and all Appendices, Amendments and Post-
  Effective Amendments to the Registration Statement which the Company may
  hereafter file with the Commission under the provisions of the Act and the
  rules and regulations promulgated thereunder; and
 
    (2) ratifies, confirms and approves any and all acts and things which
  Carl E. Fasig may lawfully take or do, or cause to be taken or done, by
  virtue of the powers granted to him hereunder.
 
  In Witness Whereof, the undersigned has hereunto set his hand this 12th day
of June, 1996.
 
 
                                          -------------------------------------
                                                     James R. Wimmer