People of the Senedd

Siân Gwenllian MS

Siân Gwenllian MS

Senedd Constituency Member

Plaid Cymru

Plaid Cymru Group


My Senedd Activities

In point 3, insert as new sub-points: ‘ensuring post-16 education institutions provide sport and leisure facilities while encouraging participation by attendees; encouraging public broa...

For debate on 11/06/2021

In point 3(d), after ‘activities’ insert 'especially amongst teenage girls and under-represented groups;'  

For debate on 11/06/2021

Add as new point at end of motion: Calls on the Welsh Government to lay before the Senedd an impact assessment showing the effect of these funding arrangements on the distribution of fun...

For debate on 10/06/2021

Insert as new points after point 2 and renumber accordingly: Believes that the UK Government approach to the prioritisation criteria for these funds is inconsistent with that of predeces...

For debate on 10/06/2021

To propose that the Senedd: Calls on the Welsh Government to act immediately to address the housing crisis.

For debate on 09/06/2021

When will the Welsh Government implement the continuity of carer model in maternity services for pregnant women who have lost a baby after a previous pregnancy?

Tabled on 08/06/2021

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