Bartolomeus Jozef Lodewijk Rosalia "Bart" Somers (born 12 May 1964 in Mechelen) is a Belgian, Flemish politician. He is currently the mayor of Mechelen.

In 2017, Bart Somers was awarded 2016 World Mayor Prize as recognition for his outstanding achievements in welcoming refugees during recent years and for the long-term integration of immigrants from different cultures, religions and social backgrounds. He obtained a law degree from the Katholieke Universiteit Leuven.

Bart Somers is the son of the former People's Union parliamentarian, Joos Somers, who was notably a deputy and a senator. After a law degree at KU Leuven, Bart Somers went through the Volksunie before joining the Open VLD in 1992.

Between 2003 and 2004, he was the Minister-President of Flanders.

After the regional elections of June 2004 he was appointed the interim chairman of the Flemish Liberals and Democrats (VLD). On 4 December 2004, he was elected with just over 50 percent of the vote to a full term as chairman.

Bart Somers was one of the three negotiators for the Open VLD during the 2007 Belgian government formation.

After his party's defeat in the regional elections of 2009, he resigned as chairman of the Flemish Liberals and Democrats.

In June 2016, the European Committee of the Regions adopted Bart Somers report on "Combatting Radicalisation and Violent Extremism: Prevention mechanisms at local and regional level". His opinion won cross-party support for its calls for more effective policing, for more cooperation between local, regional, national and European authorities, and for an approach based on respect for core principles.