Uetersen (German pronunciation: [ˈyːtɐzn̩] ⓘ, formerly known as Ütersen (Holstein)) is a town in the district of Pinneberg, in Schleswig-Holstein, Germany.

It is situated approximately 7 km (4.3 mi) south of Elmshorn, and 30 km (19 mi) northwest of Hamburg at the small Pinnau River, close to the Elbe river.

But there is also the suspicion that the name of "Ütersteen" showing what "ultra-stone" or "Ütristina", the old name of Pinnau originates.

[clarification needed] Blazon:In a red shield is a silver gate without any door.

In the open door at the base there stands a silver S-shaped object, which might show the Virgin Mary and Jesus, standing upon a golden crescent moon and flanked by two golden stars on a red background.