<ACCESSION-NUMBER>0000067716-19-000076 <TYPE>10-Q <PUBLIC-DOCUMENT-COUNT>118 <PERIOD>20190930 <FILING-DATE>20191101 <DATE-OF-FILING-DATE-CHANGE>20191101 <FILER> <COMPANY-DATA> <CONFORMED-NAME>MDU RESOURCES GROUP INC <CIK>0000067716 <ASSIGNED-SIC>1400 <IRS-NUMBER>301133956 <FISCAL-YEAR-END>1231 </COMPANY-DATA> <FILING-VALUES> <FORM-TYPE>10-Q <ACT>34 <FILE-NUMBER>001-03480 <FILM-NUMBER>191185585 </FILING-VALUES> <BUSINESS-ADDRESS> <STREET1>1200 WEST CENTURY AVENUE <CITY>BISMARCK <STATE>ND <ZIP>58503 <PHONE>701-530-1000 </BUSINESS-ADDRESS> <MAIL-ADDRESS> <STREET1>1200 WEST CENTURY AVENUE <CITY>BISMARCK <STATE>ND <ZIP>58503 </MAIL-ADDRESS> <FORMER-COMPANY> <FORMER-CONFORMED-NAME>MONTANA DAKOTA UTILITIES CO <DATE-CHANGED>19850429 </FORMER-COMPANY> </FILER>