- By descent: You are eligible for citizenship by descent if either your father or mother was a Sammarinese citizen at the time of your birth.
- By marriage: You can become a Sammarinese citizen through marriage to a Sammarinese citizen after being legally married for at least five years and have lived in San Marino for at least one year.
- By naturalization: You may be eligible for naturalization if you have been a resident of San Marino for at least 30 years, have no criminal record, and are proficient in Italian.