"Domicile" is the one location with which for legal purposes a person is considered to have the most settled and permanent connection. A person's domicile is the place where they have their most settled legal connection.Residency is where one chooses to live. Domicile is more permanent and is essentially somebody's home base. The term "domicile" refers to a person's one "true, fixed, permanent home," under California regulations. 18 Cal Code Regs §17014(c).