Dame Nia Rhiannon Griffith DBE (born 4 December 1956) is a Welsh politician who has served as Member of Parliament (MP) for Llanelli since 2005. A member of the Labour Party, she has been a Shadow Minister for International Trade since 2021. Griffith served as Shadow Secretary of State for Defence from 2016 to 2020, and Shadow Secretary of State for Wales from 2015 to 2016 and 2020 to 2021.