Treboeth (pronounced: tree-both) is a suburb and historical village in the Mynydd-Bach and Penderry wards of Swansea, Wales.

Gwyrosydd was the bardic name of Treboeth-born Daniel James, author of the Welsh language hymn Calon Lân, which is often sung in rugby matches, Welsh religious ceremonies and other events.

One theory for the origin of the name is Welsh tre (meaning town) and boeth (a mutation of poeth which means hot), referring to the large-scale burning that was involved in the clearing of the land for settlement.

The local councillors for the area are Mike Lewis, Jess Pritchard and Sam Pritchard in the Myndd-bach Electoral Ward,[5] and Mair Baker, Terry Hennegan and Erika Kirchner in the Penderry Electoral Ward[6] There is one primary education school within Treboeth, Gwyrosydd Primary.

[9] There are a number of schools in the neighbouring areas of Treboeth which educate in the mediums of English and Welsh.