Greetsiel is a small port on the bight of Leybucht in western East Frisia, Germany, that was first documented in letters from the year 1388.

The nearest railway station is at Emden, about 15–20 kilometres (9.3–12.4 mi) away, and the two towns are linked by a bus service.

Although originally just a small but picturesque fishing village, Greetsiel has become a major tourist attraction.

In December 2006, it had 1,534 inhabitants, but the number of people living in the village significantly increases during the summer months and over the Christmas holidays.

Greetsiel is first mentioned in the records in letters dating to the year 1388 (Ocko I tom Brok).

In 1462 Count Edzard the Great was born at the Cirksenaburg; under his rule East Frisia extended from the River Weser as far as Groningen.

The twin windmills (German: Zwillingsmühlen) of Greetsiel-West date from 1856 (green) and Greetsiel-Ost from 1706 (red, renovated in 1921 with parts of Aurich's Wallmühle mill of 1750).

It has been running for more than 30 years and exhibits a range of works including art, ceramics, goldsmiths' products and sculptures.

Every two years, the Imke Folkerts Prize for Fine Arts, worth 10,000 euros, is awarded at the event.