Otto Louis of Salm, Wild- and Rhinegrave of Kyrburg and Mörchingen (13 October 1597 – 6 October 1634, Speyer) was a Swedish general during the Thirty Years' War.

He was governor in the Alsace and Commander of the Swedish troops in the Upper Rhine.

His parents were John IX of Salm-Kyrburg-Mörchingen (1575–1623) and Anna Catherine, Baroness of Criechingen (d. 1638).

She was the daughter of Count Johann Reinhard I of Hanau-Lichtenberg (1569–1625) and Countess Maria Elisabeth of Hohenlohe-Neuenstein (1576–1605).

With Otto Louis she had another son, Wild- and Rhinegrave John XI (born: 17 April 1635; died: 16 November 1688 in Flonheim, buried in the church of Kirn).