Onuoha was born in Nigeria but has turned out for England Under-21s.
Yet Vogts faces a race against time as Onuoha cannot switch allegiances after his 21st birthday on November 12.
Vogts said: "I have to speak with him and let him know he has a good opportunity to do well with Nigeria.
"He hasn't much time to decide. I hope he can see the great players we have and decide to become part of such an exciting group."