Newchurch and Merthyr (Welsh: Llannewydd a Merthyr) is a community located in Carmarthenshire, Wales including the villages of Newchurch (Welsh: Llannewydd) and Merthyr.

[1] The community is bordered by the communities of: Cynwyl Elfed; Bronwydd; Carmarthen; Llangynog; St Clears; Meidrim; and Abernant, all being in Carmarthenshire.

In May 2022 the community was transferred from the Cynwyl Elfed electoral ward to the county ward of Trelech.

The Trellech ward elects one councillor to Carmarthenshire County Council.

This Carmarthenshire location article is a stub.