Wolmirstedt was until 1994 district town of the Wolmirstedt District. In this year the districts Haldensleben and Wolmirstedt were united to form the Ohrekreis, with the seat of district administration in Haldensleben. In 2007, the Ohrekreis was merged with the Bördekreis district to form the Börde district.
In Wolmirstedt there is a large substation for 380kV. On the area of this transformer an HVDC back-to-back station with a transmission rate of 600 megawatts was planned, but this plan was canceled after the German reunification in 1990, because it was decided to synchronize electricity mains of East and West Germany. The 380kV line running from the transformer station Wolmirstedt to the shut-down nuclear power station Lubmin is the longest power line in Germany.