Egernsund (German: Ekensund) is a small town, with a population of 1,437 (1 January 2024),[1] in Sønderborg Municipality, Region of Southern Denmark in Denmark.

Egernsund is situated on the northwestern end of the small peninsula of Broager Land on the northern shore of Flensborg Fjord (Flensburg Firth) and east of the short and narrow strait, called Egern Strait, connecting the firth with the small inlet of Nybøl Nor to the north.

It was built in 1909 of hand stroke stones from the region's own brickworks and is reminiscent of churches in Southern Europe.

[3] Egernsund and Broager Land as a hole was a center for brickproduction in Denmark with more than 40 brickworks operating in the area at its peak around 1890.

Petersen Tegl, on the southern shore of Nybbøl Nor, 3 km east of Egernsund and 2 km northwest of Broager is one of the seven remaining brick manufacturer in the area.