Zadviria (Ukrainian: Задвір'я, Polish: Zadwórze) is a village in Western Ukraine.

[1] According to the 2001 Ukrainian census the population of Zadviria was 1855 persons.

Population distribution by a native language according to the 2001 Ukrainian census:[2] In the northern part of the village, there is a wooden Virgin Mary Church of the Ukrainian Greek Catholic Church.

[3] Near the main road, the abandoned Roman Catholic Virgin Mary Queen of Poland Church is located.

Nowadays, there is an ongoing construction of a new All Ukrainian Saints Church.