Wiązowna [vjɔ̃ˈzɔvna] is a village in Otwock County, Masovian Voivodeship, in east-central Poland. It is the seat of the gmina (administrative district) called Gmina Wiązowna. It lies approximately 7 kilometres (4 mi) north-east of Otwock and 23 km (14 mi) east of Warsaw.
The village has a population of 980.
Wiązowna has a dry-summer humid continental climate (Köppen Dsb).