Following the Partitions of Poland at the end of the 18th century, Radzyń was annexed by Austria, then following the Austro-Polish War, in 1809, it was liberated by Poles and included within the short-lived Duchy of Warsaw, and after its dissolution, in 1815 it became part of Russian-controlled Congress Poland. Many inhabitants participated in the large Polish uprisings of 1830–1831 and 1863–1864. In 1867 Russian authorities created Radzyń County, which gave the town a boost. Later on, Radzyń got a rail connection with Lublin and Siedlce, and the town began a period of development.