The settlement was established in 1801 under the name Świniary, which came from the word świnia, which means "pig", as the inhabitants were engaged in pig farming.[3] In 1820 it was renamed Orężna after the Polish word oręż, which means "weapon".[3]
In the interwar period, it was administratively located in the Warsaw County in the Warsaw Voivodeship. According to the 1921 census, the village had a population of 115, entirely Polish by nationality, 68.7% Roman Catholic and 31.3% Lutheran by confession.[4]
Following the joint German-Soviet invasion of Poland, which started World War II in September 1939, Orężna was occupied by Germany. In 1944, local man Bolesław Grzywaczewski hid two Polish resistance members in Orężna.[5] The following day, two Ukrainian auxiliaries arrived to find the partisans.[5] The partisans threw a grenade at them, killing, according to various testimonies, either one or both of the Ukrainians.[5] In retaliation, on August 4, 1944, either the Germans or Ukrainians pacified the village, murdering three women, a man and a 5-year-old girl, then captured nine men and one woman and massacred them in nearby Zalesie Dolne.[5][Note 1]
Orężna was included within the town limits of Piaseczno as its new neighbourhood in 1952.[6]
Poland