Gniazdowo, Masovian Voivodeship

Gniazdowo is a village in the administrative district of Gmina Stary Lubotyń, within Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. It lies approximately 4 km west of Stary Lubotyń, 15 km north of Ostrów Mazowiecka, and 100 km north-east of Warsaw.

History
In 1827, Gniazdowo had a population of 222.

During the German invasion of Poland which started World War II, on September 10, 1939, German troops carried out a massacre of some 20 Poles (see Nazi crimes against the Polish nation).