B40 Balkan Cities Network

The B40 Balkan Cities Network (B40) is an intercity organization between Balkans cities. The network was established with the Istanbul Declaration signed by 23 mayors at the end of the Istanbul Summit held on 29–30 November 2021 with a “Better Future, Better Cooperation” motto. The aim of the network is to create better cooperation between local governments and contribute to regional development.

Member cities
As of 2024, the network has 54 member cities.