Sanniki [sanˈniki] is a town[1] in Gostynin County, Masovian Voivodeship, in central Poland.

During the German occupation of Poland, the Jews were forced to live in a small ghetto.

In 1940, the German gendermerie and SS carried out expulsions of local Poles, who were sent to a transit camp in Kutno and then deported to forced labour in Germany.

[3] In 1941, the Jews were forced to demolish a local church so Germans could photograph it for their anti-semitic propaganda.

In early 1942, the 250 Jews left in the ghetto were deported to the Chełmno extermination camp to be murdered.