Greetsieler Zwillingsmühlen, Twin windmills in Greetsiel, Krummhörn, Germany

The Greetsiel Twin Mills are two distinctive windmills at the eastern entrance of Greetsiel village in Krummhörn, consisting of a red mill and a green mill. They stand around 130 meters apart and shape the East Frisian landscape with their different colors and functions.

A post mill stood on the green mill's site by 1613; destroyed by a storm in 1662, it was replaced, and in 1856 the Grimersum landowner Bussen had it rebuilt as a two-storey gallery mill that opened in 1857. The red mill was built in 1706, burned in 1736 and 1920, and rebuilt in 1921 using the roughly 200-year-old frame of Aurich's demolished Wallmühle.

Both mills show traditional East Frisian milling techniques, with the red one still producing flour and the green one housing a tea room and art gallery. They are important landmarks of local craft culture and shape the village's character.

Visitors will find parking near the southeastern side of the mills along Mühlenstraße. Both mills are easily accessible on foot from there and well signposted.

The red mill's sails were removed in 2017 for safety reasons; the cap came off for restoration in February 2024 and was replaced in July 2025, followed shortly by completely new sails. Above the entrance sits a gable stone dated November 1920, recalling the rebuild after the 1920 fire.