"Next, we'll adopt," Jolie tells CNN's Anderson Cooper in an interview to air Tuesday on "Anderson Cooper 360" (10 p.m. EDT).
Jolie, 31, gave birth to daughter Shiloh Nouvel Jolie-Pitt in Namibia last month. The couple have two older children, 16-month-old Zahara, adopted from Ethiopia, and 4-year-old Maddox, adopted from Cambodia.
"We don't know which -- which country. But we're looking at different countries," the actress tells Cooper. "And we're -- I'm just -- it's gonna be the balance of what would be best for Mad and for Z right now. It's, you know, another boy, another girl, which country, which race would fit best with the kids."
Both Maddox and Zahara's surnames have been legally changed to Jolie-Pitt after Pitt, 42, announced his intention to adopt the children.
The Jolie interview will air Tuesday as part of CNN's entire day of programming devoted to World Refugee Day.