Krasnosielc [krasˈnɔɕɛlt͡s] is a village in Maków County, in the Masovian Voivodeship, on the river Orzyc, in east-central Poland.

In 1386, the local Catholic parish was founded by bishop of Płock Ścibor z Radzymina and standard-bearer Paweł z Radzanowa of Prawdzic coat of arms.

The Jewish district was defined by a legal document according to which Jews were obliged to pay rent to count Józef Krasiński.

Following the German invasion of Poland, which started World War II, SS units of Panzer Division Kempf forced the Jews into the synagogue and massacred them there.

[5] In the beginning of the German occupation, the occupiers also carried out mass searches of homes of local policemen, postal workers and court employees.

[9] Expelled Poles were either enslaved as forced labour of new German colonists in the county or deported to more southern locations of occupied Poland, while their farms were afforested.