Ciechanów [t͡ɕeˈxanuf] (
listen) is a town in north-central Poland with 47,900 inhabitants (2002). It is situated in Masovian Voivodeship (since 1999). It was previously (1975–98) the capital of Ciechanów Voivodeship.
Before World War II, it was home to a large Jewish community. During the war many Polish Jews and resistance fighters were executed by the Germans in the castle. The town was annexed by Nazi Germany in 1939 and known as Zichenau in German. It was the capital of Regierungsbezirk Zichenau, a subdivision of the Province of East Prussia. The territory was restored to Poland after the war.
Coordinates: 20°37′E / 52.883, 20.617