Corey Domachowski (born 11 September 1996) is a Welsh professional rugby union player who plays as a prop for United Rugby Championship club Cardiff and the Wales national team.
Domachowski played for Rhondda Schools as a back-row, and was a goal kicker, before converting to prop when he moved to Gilfach Goch RFC.
Domachowski made his debut for Cardiff in March 2016 against Glasgow Warriors having previously played for the academy team. The Church Village-born loosehead prop represented Wales at under-20 level, and featured for Cardiff Rugby as a replacement in Challenge Cup quarter final defeat to Gloucester in 2017. He signed his first senior contract with the club in October 2017.
He signed an extension with Cardiff in August 2023, followed by a further extension in January 2024.
Domachowski represented Wales U20 in 2016, and won the grand slam during the 2016 Six Nations Under 20s Championship.
On 1 May 2023, Warren Gatland selected him in Wales' 54 player training squad for the Rugby World Cup 2023.
Domachowski made his debut on 5 August 2023, starting for Wales in the first test of their 2023 Rugby World Cup warm-up matches, in a win against England
Domachowski's great-grandfather, Stefan, escaped from the Auschwitz concentration camp and eventually moved to Wales, settling in Pencoed and working as a miner.