Xavier Trias i Vidal de Llobatera (Catalan pronunciation: [ʃəβiˈe ˈtɾi.əz i βiˈðal də ʎuβəˈteɾə]; born 5 August 1946) is a Spanish politician, member of Together for Catalonia and was Mayor of Barcelona from July 2011 to June 2015.

Between 1971 and 1973 he completed his post graduate training in Genoa, Italy and Bern, Switzerland, where he worked for a year and a half in the investigation of metabolic diseases, their diagnosis and treatment.

With the Minister Laporte, Trias is considered responsible for the promotion and development of the Catalan health care model, prestige and international recognition.

In this era, the government created the Catalonia Broadcasting Council (CAC), and improved the labor regime for the officials of the Generalitat, with progress in reconciling family life, among other initiatives.

He won and became President and Spokesperson for the Catalan Parliamentary Group of the Congress of Deputies, and Chairman of the Committee on Science and Technology.