The phrase "birth country" refers to the place where a person is born. It typically relates to the nation or country in which someone enters the world. Full definition
International adoptive parents most often first meet their child when they travel to the child's birth country for the adoption. (creatingafamily.org)
According to CNN «Broadway buffs will get a particular kick out of visiting Alexander Hamilton's birth country of Nevis — which is not as well known as its twin, St. Kitts. (mountnevishotel.com)
Not all Canadian banks have what is called reciprocal banks in other areas, thus necessitating interaction through the States, often through Bank of America; those receiving pensions in Canada from birth countries will note historically their funds went through New York, America's City Bank. (remonline.com)