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 support for people in Arfon who have been negatively affected by the Arbed scheme?

Tabled on 22/11/2023

What consideration has the Government given to holding an awareness campaign on the symptoms of ovarian cancer, following the recent petition by Target Ovarian Cancer and the National Fe...

Tabled on 16/11/2023

Will the First Minister provide an update on efforts to attract jobs to Parc Bryn Cegin on the outskirts of Bangor?

Tabled on 16/11/2023

What consideration has the Government given to shortening the diagnostic pathway for ovarian cancer?

Tabled on 16/11/2023

What steps is the Government taking to improve early diagnosis of ovarian cancer in Wales?

Tabled on 16/11/2023

When will the Welsh Government implement the National Optimal Pathway for Pancreatic Cancer?

Tabled on 13/11/2023

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