Ulrich Frédéric Woldemar, Comte de Lowendal (Ulrich Friedrich Woldemar Graf von Löwendal, literally transliterated into Russian as Ульрих Фридрих Вольдемар граф фон Левендаль, 1700–1755) was a Danish, German-born soldier and statesmen, from 1744 to 1755 serving in the French army. Born in Hamburg, he served in the armies of several countries, and from 1740 to 1743 acted as Governor-General of the Ostsee governorates of the Russian Empire. But he is best known for his service in the French army during the War of the Austrian Succession. In the French campaign in the Austrian Netherlands against the Pragmatic Army he served as a subordinate to Maurice de Saxe. He led French forces that captured Ghent in 1745 and Bergen-op-Zoom in 1747. The King of France, Louis XV, made him a Marshal of France for his success in capturing Bergen op Zoom.
In 1755 Louis XV gave Lowendal instructions to act as a Plenipotentiary in negotiations with Prussia, designed to prevent the Seven Years' War from breaking out. However Lowendal died before he could carry out his orders and was replaced by Louis Jules Mancini Mazarini, Duc de Nivernais.