The 1948 Montana gubernatorial election took place on November 2, 1948. Incumbent Governor of Montana Sam C. Ford, who was first elected Governor in 1940 and was re-elected in 1944, ran for re-election. He won the Republican primary and advanced to the general election, where he faced John W. Bonner, the former Attorney General of Montana and the Democratic nominee. Ultimately, Bonner defeated Ford handily in his bid for re-election, winning his first and only term as governor.
- John W. Bonner, former Attorney General of Montana
- Arthur F. Lamey, former chairman of the Montana Democratic Party
- Leif Erickson, former Chief Justice of the Montana Supreme Court, 1946 Democratic nominee for the United States Senate, 1944 Democratic nominee for Governor of Montana
- Vernon Hoven
- George M. Melton
|Democratic||John W. Bonner||29,514||37.32|
|Democratic||Arthur F. Lamey||23,214||29.36|
|Democratic||George M. Melton||3,879||4.91|
|Republican||Sam C. Ford (incumbent)||41,493||72.38|
|Republican||Leonard C. Young||11,023||19.23|
|Democratic||John W. Bonner||124,267||55.73%||+12.56%|
|Republican||Sam C. Ford (incumbent)||97,792||43.86%||-12.50%|
|Democratic gain from Republican||Swing|
- "Report of the Official Canvass of the Vote Cast at the Primary Election Held in the State of Montana, July 20, 1948" (PDF). Montana Secretary of State. Archived from the original (PDF) on 2013-05-28. Retrieved July 5, 2014.
- "Official Montana General Election Returns, November 2, 1948" (PDF). Montana Secretary of State. Archived from the original (PDF) on December 28, 2013. Retrieved July 5, 2014.