Trecwn (Welsh: Trecŵn [trɛˈkuːn]) is a village in Pembrokeshire, west Wales, 1.6 miles (2.6 km) east of the A40 (Fishguard to Haverfordwest) road in the community of Scleddau.

Barham Memorial School, a Grade II listed building,[3][4] closed in 2001 following the closure of the armaments depot (see below) a few years before.

[8] The Llanstinan parish church of St Justinian is a Grade II* listed building of mediaeval origin, rebuilt in the 19th century.

[11] Omega Pacific in 1998 tentatively proposed the site could be used for storing low-level nuclear waste, a plan shelved owing to public opposition.

[11] Plans submitted by The Valley (Pembrokeshire) Ltd to build a 25-megawatt biomass energy plant on the site were conditionally approved in 2015,[14] but by August 2018 work, with the promise of 40 jobs, had not been started by current owners Manhattan Loft Corporation, leading to questions by the local councillor.