In 1375, the Waldgraves Otto and Friedrich of Kyrburg shared out landholds and rights between themselves that they owned in the Amt of Otzweiler, which also comprised, among other places, Hundsbach, Schweinschied and Löllbach.

The inhabitants only had a unified administration when the French Revolutionary rulers assigned Otzweiler to the newly created Mairie (“Mayoralty”) of Schmidthachenbach in the Canton of Grumbach.

In the early 1820s, this body's seat moved from Hundsbach to Becherbach bei Kirn, where the Amt administration responsible for Otzweiler remained until 1940.

[4] Like many places in the region, Otzweiler can claim to have had its dealings with the notorious outlaw Schinderhannes (or Johannes Bückler, to use his true name).

On 11 January 1800, Schinderhannes committed a robbery and murder in Otzweiler, thereafter making good his escape to the Rhine’s right bank.

[1] The German blazon reads: Über blau-golden geschachtem Schildfuß in Silber ein roter Mühlstein belegt mit einem goldenen Mühleisen.

The municipality's arms might in English heraldic language be described thus: Per fess argent a millstone gules charged with a millrind palewise Or, and chequy azure and Or.

After consent by the state archive, the Ministry of the Interior in Mainz granted approval for Otzweiler to bear its own arms on 4 July 1966.