The village of Aichhalden was acquired in 1345 by the County of Württemberg and was assigned to the district of Neuweiler, then to that of Calw in the early 16th century.

Simmersfeld, Beuren, and Ettmannsweiler were manorial estates of the township of Altensteig, which became a possession of the now-Duchy of Württemberg in 1603 and made the seat of its own district.

[2] The municipality (Gemeinde) of Simmersfeld is located at the south-western edge of the district of Calw, in the German state of Baden-Württemberg.

The municipal area lies within the greater Black Forest region, stretching from the upper valley of the Kleine Enz in the north to the Nagold in the south.

[2] A portion of the federally protected Köllbach valley [de] nature reserve is located in Simmersfeld's municipal area.