F O L E Y  &  L A R D N E R            Exhibit (5)

                          A T T O R N E Y S  A T  L A W

   CHICAGO                       FIRSTAR CENTER                     SAN DIEGO
   JACKSONVILLE             777 EAST WISCONSIN AVENUE           SAN FRANCISCO
   LOS ANGELES           MILWAUKEE, WISCONSIN 53202-5367          TALLAHASSEE
   MADISON                  TELEPHONE (414) 271-2400                    TAMPA
   ORLANDO                  FACSIMILE (414) 297-4900         WASHINGTON, D.C.
   SACRAMENTO                                                 WEST PALM BEACH
                              WRITER'S DIRECT LINE


                                February 23, 1998




   WPL Holdings, Inc.
   222 West Washington Avenue
   Madison, Wisconsin  53703

   Ladies and Gentlemen:

             We have acted as counsel for WPL Holdings, Inc., a Wisconsin
   corporation (the "Company"), in conjunction with the preparation of a Form
   S-8 Registration Statement (the "Registration Statement") to be filed by
   the Company with the Securities and Exchange Commission under the
   Securities Act of 1933, as amended ("Securities Act"), relating to
   1,200,000 shares of the Company's common stock, $.01 par value (the
   "Common Stock"), the associated rights to purchase shares of Common Stock
   accompanying each share of Common Stock ("Rights") and interests in the
   Interstate Energy Corporation 401(k) Savings Plan, as amended to date (the
   "Plan"), which may be issued or acquired pursuant to the Plan.  The terms
   of the Rights are as set forth in that certain Rights Agreement, dated as
   of February 22, 1989, by and between the Company and Morgan Shareholder
   Services Trust Company (the "Rights Agreement").  

             As such counsel, we have examined:  (i) the Plan; (ii) the
   Registration Statement; (iii) the Company's Restated Articles of
   Incorporation and Bylaws as amended to date; (iv) the Rights Agreement;
   (v) resolutions of the Company's Board of Directors relating to the Plan
   and the issuance of securities thereunder; and (vi) such other
   proceedings, documents and records as we have deemed necessary to enable
   us to render this opinion.

             Based on the foregoing, we are of the opinion that:

             1.   The Company is a corporation validly existing under the
   laws of the State of Wisconsin.

             2.   It is presently contemplated that the shares of Common
   Stock to be acquired under the Plan will either be purchased in the open
   market, acquired in privately negotiated transactions or purchased
   directly from the Company.  To the extent the shares of Common Stock to be
   acquired under the Plan shall constitute shares newly issued by and
   purchased directly from the Company, such shares of Common Stock, when
   issued pursuant to the terms and conditions of the Plan, and as
   contemplated in the Registration Statement, will be validly issued, fully
   paid and nonassessable, except with respect to wage claims of, or other
   debts owing to, employees of the Company for services performed, but not
   exceeding six months' service in any one case, as provided in Section
   180.0622(2)(b) of the Wisconsin Business Corporation Law and judicial
   interpretations thereof.

             3.   The Rights when issued pursuant to the terms of the Rights
   Agreement will be validly issued.

             We consent to the use of this opinion as an exhibit to the
   Registration Statement.  In giving our consent, we do not admit that we
   are "experts" within the meaning of Section 11 of the Securities Act, or
   within the category of persons whose consent is required by Section 7 of
   said Act.

                                      Very truly yours,




                                      FOLEY & LARDNER