[1] The German blazon reads: Über rot-silbern geschachtem Schildfuß in Schwarz vorne ein silbernes Eichblatt mit Eichel, hinten ein silberner beschrifteter Stein.

The municipality's arms might in English heraldic language be described thus: Sable dexter an oakleaf per bend fructed of one and sinister a border stone inscribed of the field, both argent, the base countercompony gules and argent.

The charge on the dexter (armsbearer's right, viewer's left) side, the oakleaf and the acorn, stand for the municipality's wealth of woodland, while the one on the sinister (armsbearer's left, viewer's right) side, the border stone, recalls such an object within municipal limits that is under monumental protection.

The countercompony (that is, with two chequered rows) base is a reference to the village's former allegiance to the “Hinder” County of Sponheim, Oberamt of Birkenfeld.

[4] The following are listed buildings or sites in Rhineland-Palatinate’s Directory of Cultural Monuments:[5] Siesbach is also home to a Gallo-Roman barrow in the “Kipp” forest district.