Connor David O'Brien (born 12 July 2004) is an Irish professional footballer who plays as a defender for club Accrington Stanley.
O'Brien first joined the youth set-up at Accrington Stanley at the age of eight, and went on to captain the under-18s to the fourth round of the FA Youth Cup in 2021âÂÂ22. He signed his first one-year professional contract in June 2022. On 3 December 2022, he joined Northern Premier League Premier Division club Radcliffe on a one-month loan. He scored on his debut later that day, in a 2âÂÂ2 draw at Matlock Town. He played a total of seven games for Radcliffe. He made his first-team debut in the English Football League with Accrington after coming on as an 80th-minute substitute for Rosaire Longelo in a 1âÂÂ1 draw at Port Vale on 7 February 2023. On 13 February 2023, Radcliffe extended his loan by a further 2 months.
On 10 May 2024, O'Brien extended his contract at Accrington Stanley by two years.
O'Brien qualifies for the Republic of Ireland through his father, who hails from Drogheda. He made his debut for the Republic of Ireland U21 side on 7 June 2024, in a 3âÂÂ2 win away to Croatia U21 in a friendly.