The 20-year-old made four appearances for the club last season as City stormed to a Premier League and Carabao Cup double, but is believed to be keen for more regular action this season.
City were forced to fight to keep their starlet at the club last summer as it appeared he was eyeing a move to pastures new but they eventually convinced him to pen a deal through until the summer of 2021.
According to the 'Daily Mail', West Brom appear to have beaten off competition from Wolves and Utrecht to land Adarabioyo on a season-long loan.
'Baggies' boss Darren Moore is keen to strengthen his rearguard this summer and despite having already signed Kyle Bartley from Swansea, he is aware that it is unlikely that Craig Dawson will remain with the club beyond next Thursday's transfer deadline.
Both West Ham and Burnley are known to be keen on the former Rochdale defender, though West Brom are reluctant to sell for less than £20m.
Adarabioyo has been identified as a perfect replacement for Dawson, with the England U19 international thought to have traveled to the Midlands on Thursday for a medical.