Mustafa Tunç Soyer (born 1959) is a Turkish politician from the Republican People's Party (CHP) who served as the Mayor of İzmir from 2019 to 2024.

Soyer drew national attention for his success as Seferihisar mayor, having established the town as a modal tourist destination as part of the slow movement culture.

Following the announcement that the serving mayor of İzmir, Aziz Kocaoğlu, would not stand for another term, the CHP began considering new candidates.

Despite Kocaoğlu deciding to re-enter the race shortly before the CHP was due to announce its candidate, Soyer was eventually selected, having long been seen as the frontrunner.

One defendant who received 5 years in prison was Alparslan Türkeş, the founder and first leader of the Nationalist Movement Party (MHP).

When Tunç Soyer became the CHP's candidate for Mayor of İzmir in 2019, the governing People's Alliance that includes the MHP sharply criticised him for his father's actions against nationalist politicians.