Stężyca [stɛ̃ˈʐɨt͡sa] is a village in Ryki County, Lublin Voivodeship, in eastern Poland.

After the Polish victory in the Austro-Polish War of 1809, it was regained by Poles and included within the short-lived Duchy of Warsaw, and after its dissolution, from 1815 to 1918 it was part of Russian-controlled Congress Poland.

In the late Middle Ages, Stężyca was spelled as Stanzitia (1325–1327), Stazicza (1365), Stanzicza (1441), and Sthezicza (1569).

The early settlement was founded near a fortified gord, which guarded the Vistula river crossing.

In the spring of 1575, after the escape of King Henry of Poland and France, the town was the seat of the so-called "Stężyca Sejm" from 12 May to 4 June 1575.