| Vencel Házi | |
| Order: | Hungarian Ambassador to the United States |
| Term Start: | 2 August 1983 |
| Term End: | 24 May 1989 |
| Predecessor: | János Petrán |
| Successor: | Péter Várkonyi |
| Birth Date: | 3 September 1925 |
| Birth Place: | Okány, Kingdom of Hungary |
| Death Place: | Budapest, Hungary |
| Profession: | politician |
| Party: | MSZMP |
Vencel Házi (3 September 1925 – 22 January 2007) was a Hungarian diplomat and economist, who served as Hungarian Ambassador to Greece (accredited to Cyprus) 1960 to 1964 to the United Kingdom from 1970 to 1976 and as Hungarian Ambassador to the United States between 1983 and 1989. He also served as Deputy Minister of Foreign Affairs twice (1968–1970 and 1976–1983).