West Usk Lighthouse is a Grade II-listed building on the Severn Estuary at the mouth of the River Usk south of the city of Newport, South Wales.

It was the first to be built by James Walker (1781–1862), a prominent Scottish civil engineer.

The land around the lighthouse has been reclaimed as farmland but it stood on an island until 1856.

Alternatively, it may be reached by a 1 kilometre (0.62 mi) walk along the sea wall footpath from the car park of the Lighthouse Inn on Beach Road.

It was featured in July 2008 on an episode of the Channel 5 television series The Hotel Inspector[3] and in 2020 on the Doctor Who twelfth series episode "Fugitive of the Judoon".