Jan Andrzej Morsztyn (1621–93) was a Polish poet, member of the landed nobility, and official in the Polish-Lithuanian Commonwealth.
He was starosta of Zawichost, Tymbark and Kowal.
He was also pantler of Sandomierz (1647–58), Royal Secretary (from 1656), a secular referendary (1658–68), and Deputy Crown Treasurer from 1668.
Apart from his career at the Polish court, Morsztyn is famous as a leading poet of the Polish Baroque and a prominent representative of Marinist style in Polish literature.
Over his lifetime he accumulated considerable wealth.
In 1683 he was accused of treason and was forced to emigrate to France.