Paweł Jan Działyński (1594–1643) was a voivode of Pomerania from 1630 to 1643.
Between 1604 and 1613 he was the delegate of regional szlachta of Chełm to the Polish Sejm.
Between 1637 and 1638 he mediated the conflict between Gdańsk and king Władysław IV Vasa over the share of tariffs taken at the port that was reserved for the Polish–Lithuanian Commonwealth.
He was known for his fervent opposition to the Protestant Reformation and as a result he founded an order of Franciscan friars in Prussia.
He died on 17 July 1649 in Bratian and was buried in Nowe Miasto Lubawskie in the basilica crypt.