Koby Owusu Arthur (born 31 January 1996) is a Ghanaian footballer who plays as a midfielder for Southern League Premier Division Central club Barwell.

A midfielder who can also play as a forward, Arthur made his Football League debut in the Championship with Birmingham City in April 2013.

[4] After moving to England he joined the youth system of Southern League club Woodford United,[5] where he was noticed by a Birmingham City scout in 2012.

Development squad coach Richard Beale described his performance as excellent: "He won his headers and tackles and he got the ball down and tried to pass it and he can be very pleased with the way he played.

[3] Amid tabloid reports of interest from Premier League clubs,[10] Arthur signed a two-year professional contract with Birmingham.

[11] He made his first-team debut on 1 April in a 3–2 defeat at home to Wolverhampton Wanderers in the Championship, coming on as a 78th-minute substitute for Mitch Hancox.

[16] On 21 March 2014, Arthur became the third Birmingham youngster, after Charlee Adams and Nick Townsend, to join Conference Premier club Lincoln City on a youth loan until the end of the season.

[20] On his second appearance, he scored his first senior goal: in the 84th minute, he latched on to a long goalkeeping clearance and "showed his strength to hold off Jordan Mustoe and bundle it past Simpson into the net" to put Cheltenham 2–1 up, which proved to be a winning lead after Accrington Stanley's Kal Naismith missed a late penalty.

[23] Given his first start in the Football League Trophy, he scored Cheltenham's second goal, again with a header, to ensure their progress to the second round at Oxford United's expense.

[30] After Gary Rowett took over as manager, Arthur had a brief run in the side,[31] and was given a new two-year contract at the end of the 2014–15 season,[32] but he never broke through to the first team; his last league appearance for the club came on 6 December 2014, in a 1–0 defeat away to Blackpool.

[citation needed] In January 2024, he joined Southern Football League Premier Division Central club Stourbridge on a dual-registration basis.

Arthur joined National League North club Rushall Olympic on 30 July 2024 following a successful trial period.