Karl Christian Erdmann of Württemberg-Oels (26 October 1716 in Wilhelminenort near Bernstadt – 14 December 1792 in Oels) was ruling duke of Württemberg-Oels and Bernstadt.

Early life He was the only son of Christian Ulrich II, Duke of Württemberg-Wilhelminenort and his wife, Countess Philippine Charlotte of Redern-Krappitz (1691–1758).

In 1755 he was one of fourteen noblemen that founded the Order of Saint Joachim.

Marriage and issue He married, in 1741, Countess Marie Sophie Wilhelmine of Solms-Laubach (1721–1793), daughter of Count Friedrich Ernst of Solms-Laubach (1671–1723) and his wife, Fredericka Charlotte of Stolberg-Gedern (1686–1739). They had two children: Friederike Sophie Charlotte Auguste (1 August 1751 – 4 November 1789), who married Frederick Augustus, Prince of Brunswick-Wolfenbüttel-Oels. Friedrich Christian Karl (1757–1759), died in infancy.

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