Swainbost (Scottish Gaelic: Suaineabost) is a village on the Isle of Lewis in the district of Ness, in the Outer Hebrides, Scotland.

The island's Anglo-Scottish landlord had expected the crofters evicted from Uig to emigrate and only reluctantly granted them land at Swainbost to avert the threat of violence.

[3] At the shore, there is a large depression called Suaineabost Sands which displays glacier activities and is run through by a river.

The remains of the church of Saint Peter, Teampull Pheadair, are located north of the settlement.

It is estimated that the graveyard has more than 4,000 graves, but only 114 bear inscribed memorials, the earliest decipherable tombstone is of Alexander Murray from 1857, after the church had fallen out of use.