The flag of Hagen, North Rhine-Westphalia, is a horizontal bicolormof blue on the top and yellow-gold on the bottom of the flag, with the city’s coat of arms placed in the center of the flag. The flag is somtimes seen without the coat of arms and looks similar to Ukraine.
The arms of Hagen were adopted in 1897, and the flag was adopted sometime after, designed by the City of Hagen.