The 2021 Senedd election took place on Thursday 6 May 2021 to elect 60 members to the Senedd. It was the sixth devolved general election since the Senedd was established in 1999. The election was held alongside the Scottish Parliament election, English local elections, London Assembly and mayoral election and the Hartlepool by-election.

The Senedd, officially known as the Welsh Parliament in English and Senedd Cymru in Welsh, is the devolved, unicameral legislature of Wales. A democratically elected body, it makes laws for Wales, agrees to certain taxes, and scrutinises the Welsh Government. It is a bilingual institution, with both Welsh and English being the official languages of its business. From its creation in May 1999 until May 2020, the Senedd was officially known as the National Assembly for Wales and often simply called the Welsh Assembly.