James John O'Brien (born 28 September 1987) is a professional footballer who most recently played as a central midfielder for Notts County.

[11] A first-team regular during the first half of the season, he scored his first goal for the club in an FA Cup second-round replay against Fleetwood Town.

[12] On 18 January 2017, O'Brien joined Scottish Premiership side Ross County on loan from Shrewsbury until the end of the 2016–17 season.

[13] He made his debut for the club as a substitute in a Scottish Cup fourth-round tie against Dundee United, scoring the final goal in a 6–2 victory.

[23] Following manager Luke Williams departure to Swansea City, Jim O'Brien was placed in interim charge of Notts County.

[24] He oversaw one match in charge, a 5–5 draw with Grimsby Town, before the appointment of Stuart Maynard saw him return to his previous role.

[26] On 9 August 2024 O'Brien was appointed Head Coach of Sheffield United's under-18 side after Matt Thorpe departed the role.