People of the Senedd

Siân Gwenllian MS

Siân Gwenllian MS

Senedd Constituency Member

Plaid Cymru

Plaid Cymru Group


My Senedd Activities

Delete point 4 and replace with: Believes that falling teacher numbers are influenced by a myriad of factors, including workload, unnecessary bureaucracy, staffing and personnel issues,...

For debate on 15/10/2021

To propose that the Senedd: 1. Supports wholeheartedly: a) the global fight to root out racism and racist ideology and strive towards a more equal Wales, tackling systemic and structura...

For debate on 12/10/2021

To propose that the Senedd: 1. Notes: a) the Senedd’s declaration of both a climate emergency in 2019, and a nature emergency in 2021; b) that the 26th UN Climate Change Conference of...

For debate on 06/10/2021

Will the Minister make a statement on measures to tackle illegal fishing?

Tabled on 06/10/2021

Add as new sub-point at end of point 4: 'the roll-out of a network of preventative youth mental health and wellbeing centres’.

For debate on 01/10/2021

To propose that the Senedd: 1. Supports Unite, Unison and the Royal College of Nursing’s efforts to achieve fair pay for all healthcare workers. 2. Calls on the Welsh Government, in its...

For debate on 29/09/2021

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.

Register of Interests

Register of Interests – Fifth Senedd (PDF, 3.25MB)


Terms of office

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

View Register of Interests

Cross Party Membership


Calendar events: Siân Gwenllian MS