Deutschlandsender Zeesen was a facility for longwave broadcasting near Zeesen, a village south of Königs Wusterhausen in Germany.
Deutschlandsender Zeesen was built in 1927. Hereby the western of the two masts of the facility collapsed, as its construction reached a height of 40 metres. By this collapse the completion of the facility was delayed for three weeks. It took place on December 20th, 1927. Deutschlandsender Zeesen used a 280 metre long and 12 metre wide T-antenna spun between two guyed 210 metre tall masts, which were 450 metres apart from each other. It was connected directly with the transmitter which was housed in a building in the middle of the two masts. Deutschlandsender Zeesen used until 1928 the frequency 240 kHz. After 1928 its frequency was 183.5 kHz and after 1934 191 kHz. Its transmission power was until 1931 32 kilowatt, afterward it was 60 kilowatt. In 1939 it was replaced by Deutschlandsender Herzberg/Elster. In World War II it was used as reserve transmitter for Herzberg/Elster and for transmitting messages to agents of German's secret services. The facility was not destroyed in world War II, but it was dismantled in 1945 by the Soviets.