| Alberto Undurraga | |
| Birth Date: | 1969 6, df=y |
| Birth Place: | Santiago, Chile |
| Office: | President of the Christian Democratic Party |
| Term Start: | 10 November 2022 |
| Predecessor: | Aldo Mardones |
| Office1: | Member of the Chamber of Deputies of Chile |
| Constituency1: | 8th district |
| Term Start1: | 11 March 2022 |
| Term End1: | 11 March 2026 |
| Predecessor1: | Gabriel Silber |
| Office2: | Minister of Public Works |
| Term Start2: | 11 March 2014 |
| Term End2: | 11 March 2018 |
| President2: | Michelle Bachelet |
| Predecessor2: | Loreto Silva |
| Successor2: | Juan Andrés Fontaine |
| Office3: | Mayor of Maipú |
| Term Start3: | 6 December 2004 |
| Term End3: | 16 November 2012 |
| Predecessor3: | Roberto Sepúlveda Hermosilla |
| Successor3: | Christian Vittori |
| Office4: | President of the Pontifical Catholic University of Chile Students Federation |
| Term Start5: | 1991 |
| Term End5: | 1992 |
| Predecessor5: | Clemente Pérez |
| Successor5: | Fulvio Rossi |
| Party: | Christian Democratic Party |
| Occupation: | Politician |
| Profession: | Economist |
Alberto Undurraga Vicuña (born 17 June 1969) is a Chilean politician and economist currently serving as the president of the Christian Democratic Party.
Undurraga was born in Santiago on 17 June 1969. He studied at the Colegio San Ignacio and Pontifical Catholic University of Chile. He joined the Christian Democratic Party as a student in 1988, during Chile's transition to democracy.
In the early 1990s, Undurraga was president of the Student's Federation while studying at the Pontifical Catholic University of Chile. In 2004, he was elected mayor of Maipú, a city in the greater Santiago area, serving in that capacity until 2012.
In 2014, President Michelle Bachelet named him Minister of Public Works, a position he served in until Sebastián Piñera took office in 2018.
In 2021, he was one of eight candidates elected from the 8th electoral district of the Chamber of Deputies, the only one in the district from the PDC.
In 2022, the PDC national council elected him party president.