People of the Senedd

Siân Gwenllian MS

Siân Gwenllian MS

Senedd Constituency Member

Plaid Cymru

Plaid Cymru Group


My Senedd Activities

Will the Minister provide an update on fertility and IVF services available to residents in Arfon?

Tabled on 13/09/2023

What action is the Welsh Government taking to deal with the cost-of-living premium facing residents in rural communities in Arfon, as highlighted in a recent report by the Bevan Foundation?

Tabled on 06/09/2023

When will a fracture liaison service be available for constituents in Arfon as part of osteoporosis care?

Tabled on 05/07/2023

What support is available to rural schools in Arfon that are trying to encourage more active travel to school?

Tabled on 28/06/2023

To propose that the Senedd: 1. Notes that over a quarter of a century since devolution, Wales remains the only devolved nation without its own legal system and powers over its police for...

For debate on 14/06/2023

Insert as new sub-point at end of point 2: take immediate action to alleviate concerns from Welsh-medium providers regarding the availability of Welsh language resources to support ALN w...

For debate on 09/06/2023

More information and calendar events

Detailed information: Siân Gwenllian MS


Key interests and achievements

Siân was elected to the National Assembly in 2016. She represents the Arfon constituency as a member of Plaid Cymru.  Siân was re-elected to the Welsh Parliament in 2021, doubling her majority with 63.3% of the vote - the highest percentage of any Member of the Welsh Parliament. Her interests outside politics include theatre, art, the Welsh music scene, football and rugby.

Personal history

Siân was educated at Ysgol Friars, Bangor and at Aberystwyth and Cardiff Universities. After losing her husband she brought up her 4 children on her own. She has been a passionate campaigner for women's equality and the Welsh language for over 45 years.

Professional background

Siân worked as a journalist with the BBC, HTV and Golwg. She also worked in public relations including as press officer for Gwynedd Council.

Political history

Siân was active with a number of community organizations, both as a school governor and as a community councillor. Between 2008 and 2016 she served as a councillor on Gwynedd Council, representing the village where she grew up, Y Felinheli. Between 2010 and 2012 she was responsible for the authority's finance portfolio and between 2012 and 2014 she was a member of the Cabinet for education, children and young people and Deputy Leader of the Council. In 2014 Siân was appointed as Gwynedd's small business champion, responsible for promoting this sector of the economy in the county. She was Chairman of the Arfon Constituency Committee for Plaid Cymru.


Terms of office

  1. 06/05/2016 - 28/04/2021
  2. 08/05/2021 -

View Current Register of Interests

Cross Party Membership


Media Assets

Calendar events: Siân Gwenllian MS