At that time, it belonged to the Jedliński family (Nabram coat of arms), and in the second half of the 16th century, Jedlińsk emerged as one of centers of the Protestant Reformation in northern Lesser Poland.

The town had a Calvinist prayer house, together with a school, which competed with the famous Racovian Academy (see also Polish Brethren).

After the Partitions of Poland, Jedlińsk shortly belonged to the Habsburg Empire, and on 11 June 1809 a battle between the Polish Army and the Austrians took place here, during the Polish–Austrian War.

In 1815 – 1915, Jedlińsk belonged to Russian-controlled Congress Poland, and the Russians stripped it of the town charter in 1869, as a punishment for the January Uprising.

In July or August 1942, the Jews were rounded up, a number shot on the spot, and the rest transferred to the Bialobrzegi ghetto.