Filed pursuant to Rule 424(b)(3)
                                                              File No. 333-06127

                            MDU Resources Group, Inc.
              Dividend Reinvestment and Direct Stock Purchase Plan
                  Supplement to Prospectus Dated March 21, 2003

This supplement amends and supplements the prospectus dated March 21, 2003
relating to our Dividend Reinvestment and Direct Stock Purchase Plan. Please
read this supplement together with the prospectus.

Plan Administrator
The plan administrator has changed its name and contact information. The plan
administrator's name is now Wells Fargo Bank, N.A., and the new contact
information for the plan administrator is as follows:

Internet addresses:
General Inquiries:  www.wellsfargo.com/shareownerservices
Account Information:  www.shareowneronline.com

Telephone/fax numbers:
Tel:  1-877-536-3553*
Tel:  1-651-450-4064* (outside the United States)
Fax:  1-651-450-4085

*A representative is available Monday through Friday,  between the hours of 7:00
a.m. and 7:00 p.m. Central Time. An automated voice response system is available
24 hours a day, 7 days a week.

Mailing address:                                 Certified/Overnight Mail:
Wells Fargo Shareowner Services                  Wells Fargo Shareowner Services
PO Box 64856                                     161 North Concord Exchange
St. Paul, MN 55164-0856                          South St. Paul, MN 55075-1139

Account Forms
Effective as of June 1, 2004, the plan administrator will eliminate the account
election form. After this date, you should use the revised account authorization
form to make changes to your plan account that you previously requested on the
account election form. The transaction request form remains the same. For
additional information relating to account forms, see question 5 in the
prospectus.

Money Orders
The plan administrator will no longer accept money orders for optional cash
investments. For additional information relating to optional cash investments,
see question 13 in the prospectus.

Uncollected Optional Cash Investments
If your optional cash investment, made by check or automatic withdrawal, is
returned for any reason and the plan administrator has already credited your
account for the purchase, it will sell the purchased shares and debit your
account. The plan administrator will also charge a $25 returned funds fee. The
plan administrator will collect this fee and any market loss incurred on the
sale of the shares through the sale of additional shares from your plan account.



Direct Deposit of Sale Proceeds
When submitting a transaction request form that requests net proceeds from the
sale of all or part of your shares be deposited directly to a bank account, you
must provide a voided blank check or savings deposit slip. If you are unable to
provide a voided check or deposit slip, you may submit your bank information in
writing with your signature(s) medallion guaranteed. In the event you are unable
to provide the necessary documentation described above, the plan administrator
will send you a check for the net proceeds. For additional information relating
to selling shares in your plan account, see question 25 in the prospectus.

Termination Requests
If you submit a request to close your account that is received on or after a
dividend record date but before the payment date, the plan administrator will
process your termination as soon as practicable. The plan administrator will not
reinvest the dividend and will mail a separate dividend check to you. For
additional information relating to closing your plan account, see question 31 in
the prospectus.

April 14, 2004