In 1075, Demerath had its first documentary mention as Diemunderode. In 1319, the village was called Demeroyt, in 1341 Dymelderade and in 1368 Dymenroide. In 1475, the village church was described as the Demarait branch of the Parish of Wollmerath. From 1518, there was a high court in Demerath held by the Counts of Manderscheid. In 1644 came the Battle of the Steineberger Ley, at which many of the area's inhabitants were slaughtered by Lotharingian troops. In 1728, Demerath, Ambts Dauhn got a Polizey oder Dorfordnung. In 1794 the village was occupied by French troops. About 1794, the so-called Freiheitseiche was planted. In 1803, Demerath was raised to a parish in its own right. Beginning in 1815, after Prussian rule had begun, Demerath belonged to the Daun district. In 1841, the municipality received a new police force for the Bürgermeisterei of Gillenfeld. From 1904, there was telephone service in Demerath. In 1920, the volunteer fire brigade was founded, as was the music club in 1960. In 1970, the local school was dissolved, and in 2003, the ailing Freedom Oak was felled and a new one was planted.
Politics
Municipal council
The council is made up of 8 council members, who were elected by majority vote at the municipal election held on 7 June 2009, and the honorary mayor as chairman.
The German blazon reads: Unter silbernem Schildhaupt, darin schräggekreuzt rotes Schwert und roter Schlüssel, in Grün ein goldener Stein, aus dem unteren Schildrand wachsend, darüber zwei goldene Eichblätter mit Eicheln. The municipality's arms might in English heraldic language be described thus: Vert issuant from base a stone, above which an oak twig issuant from the chief leafed and fructed of two, the whole Or, in a chief argent a sword hilt sable and a key in saltire both gules, the key in bend sinister and surmounting the sword. In its composition, the municipal arms go back to the French Revolution. The tinctures gules and argent in the chief stand as a reminder of the municipality's former allegiance to the Electorate of Trier. The key and the sword refer to the local patron saints, Peter and Paul. The stone in the base is a representation of the court stone before the church, and the oak sprig above stands for the Freiheitseiche, planted in the time of French rule, under which this court stone stood. The high court that sat here carried out its death and mutilation penalties upon this stone. The field tincture, vert, stands for the village's charming, rustic location in the scenic conservation area.
