Sońsk [sɔɲsk] is a village in Ciechanów County, Masovian Voivodeship, in north-central Poland.

It is the seat of the gmina (administrative district) called Gmina Sońsk.

[1] It lies approximately 11 kilometres (7 mi) south-east of Ciechanów and 66 km (41 mi) north of Warsaw.

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