Leniewo [lɛˈɲɛvɔ] is a village in the administrative district of Gmina Czyże, within Hajnówka County, Podlaskie Voivodeship, in north-eastern Poland.

The village was founded around 1540 on the farm of Żuk Leniewicz, who was the first to settle in the area.

[3] After 1800, a brick chapel with a roof made of tiles was built near the manor.

In a church document from 1775 it was recorded that Leniewo had 109 people living in 28 houses.

[4] According to the 1921 census, the village was inhabited by 157 people, among whom 2 were Roman Catholic, 149 Orthodox, and 6 Mosaic.