

                                                         Exhibit 12

                     MDU RESOURCES GROUP, INC.
         COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
        AND COMBINED FIXED CHARGES AND PREFERRED DIVIDENDS


                               Twelve Months            Year
                                   Ended                Ended
                            September 30, 1997    December 31, 1996
                                   (In thousands of dollars)

Earnings Available for
  Fixed Charges:

Net Income per Consolidated 
  Statements of Income             $ 52,773           $45,470

Income Taxes                         31,041            16,087
                                     83,814            61,557

Rents (a)                             1,130             1,031

Interest (b)                         33,034            34,101

Total Earnings Available
  for Fixed Charges                $117,978           $96,689

Preferred Dividend Requirements    $    784           $   787

Ratio of Income Before Income 
  Taxes to Net Income                   159%              135%

Preferred Dividend Factor on 
  Pretax Basis                        1,247             1,062

Fixed Charges (c)                    34,164            35,132

Combined Fixed Charges and
  Preferred Dividends              $ 35,411           $36,194

Ratio of Earnings to Fixed
  Charges                             3.45x             2.75x

Ratio of Earnings to 
  Combined Fixed Charges 
  and Preferred Dividends             3.33x             2.67x


(a)  Represents portion (33 1/3%) of rents which is estimated to
     approximately constitute the return to the lessors on their
     investment in leased premises.

(b)  Represents interest and amortization of debt discount and
     expense on all indebtedness and excludes amortization of gains
     or losses on reacquired debt which, under the Uniform System
     of Accounts, is classified as a reduction of, or increase in,
     interest expense in the Consolidated Statements of Income. 
     Also includes carrying costs associated with natural gas
     available under a repurchase agreement with Frontier Gas
     Storage Company as more fully described in Notes to
     Consolidated Financial Statements.

(c)  Represents rents and interest, both as defined above.

