A Brooklyn city councilwoman wants to know why “blocs” of Asians are living in two Fort Greene housing projects — and suggested it would be “beneficial” to assign housing by ethnic group.

“How is it that one specific ethnic group has had the opportunity to move into a development in large numbers?” Laurie Cumbo, who is black, said at a council hearing on public housing Thursday

The remark, on the Whitman and Ingersoll houses, drew criticism.

“She certainly could’ve chosen her words a bit more carefully,” said Councilwoman Margaret Chin, a Chinese-American. “The fact is that there are many Asian-American families . . . who have applied to live in public housing.”

Cumbo issued an apology, saying she only wanted to know if the New York City Housing Authority “uses a cultural preference priority component” in picking tenants.

NYCHA Chair Shola Olatoye said it did not, and noted its vacancy rate is less than 1 percent, making such an influx nearly impossible.

Still, Cumbo told The Post, “There could be some benefit to housing people by culture . . . I think it needs to be discussed.”