He was re-elected as Mayor of Lyon by a large margin in March 2008, defeating Dominique Perben of the Union for a Popular Movement (UMP) in the first round by a landslide.

[2] Collomb was one of Emmanuel Macron's first close allies and vocal supporters among leading Socialists ahead of the 2017 presidential elections.

[5] Collomb was "recently revealed to have said in private that France risked a civil war unless immigration, legal and illegal, was sharply curtailed within the next five years".

[6] As minister he had "talked about France being 'flooded' by immigrants—a term frequently used by" past National Rally presidential candidate Marine Le Pen.

[7] After touring parts of Marseille, Toulouse and Paris as minister, Collomb had said, “The situation is very difficult" and used the phrase "Reconquering the Republic” to frame the challenge facing the country.

[11] Collomb was appointed to the Order of the Rising Sun, second class (Gold and Silver Star) by the Japanese government in 2019, for his contributions towards Franco-Japanese relations.