Sioned Williams grew up in the Gwent Valleys and lives in Alltwen, in the Swansea Valley with her husband Daniel and their two children.
After graduating in Welsh and English from Aberystwyth University, she won the S4C T. Glynne Davies Scholarship to study for a postgraduate diploma in Journalism at Cardiff University.
She was a journalist with BBC Wales before going to work for Swansea University as Welsh Language Policy Officer and Communications and Development Manager at Academi Hywel Teifi.
Sioned also worked for Plaid Cymru as Head of Strategic Communications.
She was Chair of Cilybebyll Community Council and a Governor of Ysgol Gymraeg Ystalyfera Bro Dur before being elected as Member of the Senedd for South Wales West in the 2021 Election.
Beyond politics, Sioned is passionate about promoting our arts and culture and is well known as a reviewer and commentator on broadcasting and the arts.