Treflys is a community in the county of Powys, Wales, and is 49.9 miles (80.4 km) from Cardiff and 154.4 miles (248.5 km) from London.^[1][2] In 2011 the population of Treflys was 484 with 15.1% of them able to speak Welsh.^[3] It is in the historic county of Brecknockshire.

Treflys
Treflys Location within Powys
Population	484
OS grid reference	SN 903 508
• Cardiff	49.9 mi (80.3 km)
• London	154.4 mi (248.5 km)
Community	Treflys
Principal area	Powys
Country	Wales
Sovereign state	United Kingdom
Post town	LLANGAMMARCH WELLS
Postcode district	LD4
Post town	LLANWRTYD WELLS
Postcode district	LD5
Police	Dyfed-Powys
Fire	Mid and West Wales
Ambulance	Welsh
List of places UK Wales Powys 52°08′42″N 3°36′18″W / 52.145°N 3.605°W / 52.145; -3.605

The villages of Beulah, Llanfechan and Garth lies within the community. Eglwys Oen Duw is a Grade II* Listed Building situated between Beulah and Abergwesyn, approximately 1.2 km NW of Beulah village.^[4] Treflys, in the Middle Ages was a "Cwmwd" within the Cantref of Buellt.

For elections to Powys County Council, Treflys is covered by the Llanwrtyd Wells electoral ward.