:List of standardised Welsh place-names in Powys

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The list of standardised Welsh place-names, for places in Powys, is a list compiled by the Welsh Language Commissioner to recommend the standardisation of the spelling of Welsh place-names, particularly in the Welsh language and when multiple forms are used, although some place-names in English were also recommended to be matched with the Welsh. The list contains 407 entries, as of November 2023.

The list is based on recommendations provided by the Place-names Standardisation Panel, convened by the Commissioner, for expert advice on the standardisation of Welsh place-names. The panel bases their decisions on a set of guidelines (currently dating to June 2023), specific to Welsh settlement names (such as those of villages, towns, and cities) and topographic features (such as lakes, mountains and rivers). The panel does not cover house or building names, although similar principles could be applied to them or to names for new developments (for which the Commissioner offers their own advice to local authorities and housing developers).{{Cite web |title=Technical guidance |url=https://www.welshlanguagecommissioner.wales/policy-and-research/welsh-place-names/technical-guidance |access-date=2023-11-18 |website=www.welshlanguagecommissioner.wales |language=en-GB}} The panel may also have used additional guidelines.{{Cite web |date=19 June 2023 |title=Guidelines for Standardising Place-names in Wales |url=https://www.welshlanguagecommissioner.wales/media/d0fbot5r/20230616-dg-s-guidelines-for-standardising.pdf |publisher=Welsh Language Commissioner}}

The list was first published in 2018,{{Cite web |last=School |first=Dr Dylan Foster Evans Head of |title=Definitive list of Welsh place names published |url=https://www.cardiff.ac.uk/news/view/1217211-definitive-list-of-welsh-place-names-published |access-date=2023-11-18 |website=Cardiff University |language=en}} and took years to put together.{{Cite news |date=2018-06-20 |title=Welsh Language Commissioner unveils place name list |language=en-GB |work=BBC News |url=https://www.bbc.com/news/44545460 |access-date=2023-11-18}} Upon creation, these lists were published under the Open Government Licence 3.0.{{Cite web |date=2023-11-06 |title=Other resources: Place-names in Wales {{!}} GOV.WALES |url=https://www.gov.wales/bydtermcymru/place-names-wales |access-date=2023-11-18 |website=www.gov.wales |language=en}}{{Cite web |title=Welsh Place Names |url=https://www.welshlanguagecommissioner.wales/policy-and-research/welsh-place-names |access-date=2023-11-18 |website=www.welshlanguagecommissioner.wales |language=en-GB}}