Figures published by Adoption Match show that in August 2016, there were 366 children on the register compared with 825 at the beginning of July this year - 28 per cent of those had BAME ethnicity.
Norman Goodwin, Chief Executive of Christian adoption agency - Adoption Matters, told Premier he is aware of the issue and the agency is trying to reduce the number.
Speaking during News Hour he said: "Last year we placed about 17 per cent of our children which were from different ethnic backgrounds. We are working very closely with a whole lot of different agencies...to try recruit more black and Asian adopters.
"The Church is a very good place to make that need known. We're always keen to hear from families who can bridge those cultural and racial needs and be particularly able to focus and bring a family to those children."
Goodwin also said 'transracial adoption' should be encouraged to help reduce the number.
He added: "It is also possible that families from other ethnicities can offer to place a child from a different background as well...in terms of trying to find families, there is no barrier that should preclude people coming forward whatever their race and ethnicity is to make a placement for that child possible."
Goodwin encouraged Christians to reach out to adoption agencies to find out more before deciding it wasn't for them
He said: "Some people feel that they may get a raw deal, they may think that it's a complicated process that people aren't going to understand them...
"Agencies like ours are really trying to encourage families to come forward, to take over those things - not to be put off by those particular prejudices or feelings that people have in terms of thinking that they're not going to be understood or they're not going to be taken forward.
"They can be and we would want them to feel that they have every opportunity to come and discuss those things with us."
Listen to Norman Goodwin speaking with Premier's Tola Mbakwe: