Sülzetal was established on 1 April 2001 by the merger of the former municipalities Altenweddingen, Bahrendorf, Dodendorf, Langenweddingen, Osterweddingen, Schwaneberg, Stemmern and Sülldorf.

[3] The Sülze valley is characterized by artesian aquifers, delivering brine (sulza) that had been used for salt production.

Seats in the municipal assembly (Gemeinderat) as of 2004 elections: The first documentation of a settlement in the area dates back to 937 with the mention of Osterweddingen and Sülldorf.

The villages of Dodendorf, Osterweddingen and Langenweddingen have access to the railway line from Magdeburg to Thale, served by the Veolia Verkehr company since 2005.

On 6 July 1967 the level crossing at Langenweddingen was the scene of one of the worst train accidents in Germany, when a bilevel train hit a tanker truck, resulting in an explosion that killed 94 people, many of them children on their way to a summer camp in the Harz mountains.