Axel Gyllenkrok, or Gyllenkrook (August 16, 1665 – September 17, 1730) was a Swedish baron, military general, and governor of Gothenburg. He is best known as being the general quartermaster of King Charles XII of Sweden. He was the operational planner whose collections of route maps and reports were used by Charles XII to prepare for the campaign in Poland and Russia.
After the King's defeat in the Battle of Poltava (July 8, 1709), Gyllenkrok followed the King to the Ottoman Empire, but was captured by the forces of Peter I of Russia at a mission in Poland. He was imprisoned in places such as Siberia, and did not return to Sweden until 1722.