For more than 500 years Halver was the seat of a Fehmic court, the earliest definite evidence of which is in 1243; it ceased to exist in 1753.

This court was most famous because of the trial of duke Henry XVI the Rich of Bavaria-Landshut and the knight of Toerring on May 2, 1430.

As part of the communal reforms of the district of Altena the Amt was dissolved on January 1, 1969, and Halver was granted city rights.

The red and white checked base refers to the fess from the arms of the Counts of the Mark.

It combined elements from the two member municipalities Halver and Schalksmühle: in the upper part is a linden branch symbolizing Halver, in the bottom the upper half of a black mill wheel as the symbol of Schalksmühle.