Kozani, administratively, functions as a municipality, from 1879. Up to then, it was recognized as community. The current mayor is Ioannis Kokkaliaris, elected in 2023.
Nikolaos Chalkias (twice), Emmanouil M. Manos, Kotias Dardoufas, Nik. Rompapas (twice), Ioannis K. Govedaros (twice), Georgios Tsiminakis, Ioannis G. Govedaros, Georgios Handgiandreou (twice), Konstantinos A. Gagalis (twice), Stefanos G. Gortsoulis, Georgios Em. Manos, Nikolaos G. Armenoulis.