| Lorenzo Dellai | |
| Office: | President of the Province of Trentino |
| Term Start: | 24 February 1999 |
| Term End: | 29 December 2012 |
| Predecessor: | Carlo Andreotti |
| Successor: | Alberto Pacher (interim) |
| Office2: | President of Trentino-Alto Adige |
| Term Start2: | 15 June 2011 |
| Term End2: | 22 January 2013 |
| Predecessor2: | Luis Durnwalder |
| Successor2: | Alberto Pacher |
| Office3: | Mayor of Trento |
| Term Start3: | 15 June 1990 |
| Term End3: | 2 October 1998 |
| Predecessor3: | Adriano Goio |
| Successor3: | Alberto Pacher |
| Party: | Union for Trentino (since 2008) Campobase (since 2022) |
| Otherparty: | DC (1977–1994) PPI (1994–2002) CM (1998–2008) ApI (2008–2012) SC (2013) PpI (2013–2014) Demo.S (2014–2017) |
Lorenzo Dellai (born 28 November 1959) is an Italian politician. He is a former member of the Chamber of Deputies, former mayor of Trento, former governor of the Autonomous Province of Trento, and former president of the region of Trentino-Alto Adige/Südtirol.
Born in Trento, Dellai was elected mayor of the city for the first time in 1990 and re-elected in 1995. In 1998, Dellai founded the Daisy Civic List, a regionalist political party active in Trentino.
Dellai has been the President of the Province of Trentino from 1999 to 2012, and the President of Trentino-Alto Adige/Südtirol from 2006 to 2008. In 2012, he joined Civic Choice and was elected deputy on electoral district Trentino Alto Adige.