(1) The court has jurisdiction over a proceeding for the adoption of an adult or emancipated minor if the petitioner has lived in Montana for at least 90 days immediately preceding the filing of a petition for adoption. (2) A petition for adoption must be filed in the court in the county in which a petitioner lives.
Jurisdiction And Venue
Mont. Code Ann. § 42-4-404, under Adoption of Adults and Emancipated Minors.
Mont. Code Ann. § 42-4-404