Jan Karol Chodkiewicz was a military commander of the Grand Ducal Lithuanian Army, who was from 1601 Field Hetman of Lithuania, and from 1605 Grand Hetman of Lithuania. He was one of the most prominent noblemen and military commanders of the Polish–Lithuanian Commonwealth of his era. His coat of arms was Chodkiewicz, as was his family name.

Hetmans of the Polish–Lithuanian Commonwealth were the highest-ranking military officers, second only to the King, in the Polish–Lithuanian Commonwealth. The first Polish title of Grand Crown Hetman was created in 1505. The title of hetman was given to the leader of the Polish Army and until 1581 it was awarded only for a specific campaign or war. Later it became a permanent title, as did all the titles in the Kingdom of Poland and Polish–Lithuanian Commonwealth. It could not be revoked unless treachery had been proven. Hetmans were not paid for their services by the Royal Treasury.