Flag of Koszalin

The flag of the city of Koszalin is divided horizontally into two equally-sized stripes, white on the top, and blue on the bottom. The flag proportions have the aspect ratio of its height to its width equal 5:8.^[1][2]

The flag was established by the City Council on 10 February 1959, making it one of the oldest city flags of Poland. Originally, the flag proportions were not specified, but later, they were set at 5:8.^[1][2]