| Ernő Mihályfi | |
| Order: | Minister of Foreign Affairs of Hungary |
| Term Start: | 31 May 1947 |
| Term End: | 24 September 1947 |
| Predecessor: | János Gyöngyösi |
| Successor: | Erik Molnár |
| Birth Date: | 3 September 1898 |
| Birth Place: | Bér, Austria-Hungary |
| Death Place: | Budapest, People's Republic of Hungary |
| Profession: | politician |
| Party: | FKGP |
| Spouse: | Gabriella Tápay-Szabó Ilona Fischer |
| Parents: | Sámuel Mihalovits |
Ernő Mihályfi (3 September 1898 – 20 November 1972) was a Hungarian politician, who served as Minister of Foreign Affairs in 1947. He learned in the Budapest University of Technology and Economics then fought in the First World War. After the war, he worked as a journalist. Between 1923 and 1924, he worked and lived in the United States. Mihályfi was member of the Independent Smallholders, Agrarian Workers and Civic Party. He also served as Minister of Information and later as Deputy Speaker of the National Assembly. He was member of the parliament until his death.