Pacyna [paˈt͡sɨna] (1943–1945, German Patzingen) is a village in Gostynin County, Masovian Voivodeship, in east-central Poland. It is the seat of the gmina (administrative district) called Gmina Pacyna. It lies approximately 22 kilometres (14 mi) south-east of Gostynin and 89 km (55 mi) west of Warsaw. The village has a population of 220.