The centre-half, 31 - available on a free transfer - is seen a viable experienced central defensive option to help step into the breach following the departure of Michael Dawson.
Onuoha, who began his career with boyhood club Manchester City, has made over 300 appearances in the Premier League and Championship.
Tigers chief Nigel Adkins has not given up hope of keeping Nottingham Forest and Vitesse Arnhem target Max Clark and feels that ‘deep down’ he wants to stay at the KCOM Stadium.
Clark’s current deal expires at the end of this month and a new one has not yet been signed, despite terms being on the table since September .
Should Clark leave the club, Hull would receive a compensation fee.
Former clubs Middlesbrough and Bristol City remain keen on Aston Villa wide man Albert Adomah, with the Midlanders facing a fire-sale of players to ease crippling debts.
The Lambeth-born winger joined the Robins in 2010 from Barnet and stayed for three years, making 131 league appearances, scoring 17 goals, before departing Ashton Gate for Boro.
Adomah is understood to be willing to stay at Villa Park but the Villa hierarchy may decide to consider bids for the player.
Everton midfielder Muhamed Besic is open to returning to Middlesbrough, following his successful loan spell last season.
Blues manager Marco Silva is likely to overhaul the club’s squad, which could lead to Besic heading to pastures.
The Bosnian says he is more than happy to return to Boro on a permanent deal next season, should he have no future at Goodison Park.
Sheffield Wednesday midfielder Sean Clare, who has rejected a new deal and will be a free agent at the end of this month, is on the radar of 14 clubs, reportedly.
They include Everton, Cardiff City, Celtic, Leeds United and Rangers, who have held talks with the player’s representatives.
Bolton Wanderers have made contact with ex-Sheffield United striker Clayton Donaldson about a move to the Macron Stadium.
The 34-year-old is available on a free transfer after leaving Bramall Lane and is believed to interest Phil Parkinson as a back-up striker.