Wąsewo [vɔ̃ˈsɛvɔ] is a village in Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland.

During the German occupation of Poland (World War II), various Polish underground resistance organizations were formed in the area by late 1939.

The organizations were soon unified into a district of the Home Army under the cryptonym "Opocznik" ("wheatear") by Major Eugeniusz Mieszkowski nom de guerre Ostry.

[2] It covered the former Ostrów County, and was divided into five centers, one of which was located in Wąsewo.

This Ostrów Mazowiecka County location article is a stub.