Niksowizna is a village in the administrative district of Gmina Kolno, within Kolno County, Podlaskie Voivodeship, in north-eastern Poland.
According to the 1921 census, the village was inhabited by 217 people, among whom 204 were Roman Catholic, 7 Evangelical, and 6 Mosaic. At the same time, 211 inhabitants declared Polish nationality, and 6 were Jewish. There were 47 residential buildings in the village.