Polykarp Leyser IV (4 September 1690 in Wunstorf – 7 April 1728 in Helmstedt) was a German Lutheran theologian, philosopher, physician, lawyer and historian. He was the son of Polykarp Leyser III, the great-grandson of Polykarp Leyser II and the great-great grandson of Polykarp Leyser the Elder, all also theologians.

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  • DNB entry
  • ADB entry
  • "Entry". Zedlers Universallexikon. Vol. 17. p. 384.