Can American adoptive parents apply for immigration for their adopted children?

A: Legally speaking, adopted children are regarded as their own children and enjoy the same rights and obligations.

1. If your sister is your mother's legally adopted daughter, now that you are a citizen, you should be able to apply for a citizen green card for her.

2. If your father is your sister's legal adoptive father and he is a citizen, he can also help your sister to apply for a green card for a citizen's married child.

It should be noted that when you and your father apply for identity, your sister's data is included in the column of relatives.