Philip Christoph von Königsmarck or Philipp Christoph Königsmarck, (Stade, 4 March 1665 – 2 July 1694, Hanover) is a Swedish count of Brandenburgian extraction and a soldier.

He is allegedly the lover of Sophia Dorothea, Princess of Celle, the wife of Duke George Louis of Brunswick and Lunenburg, the heir presumptive of the Principality of Calenberg, later to become Elector of Hanover (as George I Louis, 1708) and King of Great Britain (as George I, 1714).