Newtown West covers the largely rural northwest quadrant of the community north of the River Severn.

The Rhiwcynon and Llandinam and Dolfor wards border to the west.

[6] Effective from the 2022 local elections, Newtown Llanllwchaiarn West was renamed as Newtown West (Welsh: Gorllewin y Drenewydd),[7][8] though retaining the same borders and county council representation.

At the May 2017 Powys County Council elections four of the five sitting councillors in Newtown and Llanllwchaiarn stood down, with Llanllwchaiarn West being won from the Independents by a Conservative Party candidate, Mark Barnes, one of many Tory gains across Powys.

At the May 2017 town council elections only the Llanllwchaiarn West ward held a contest, with four candidates competing for the three seats.