Italian/American dual citizenship requirements include five basic guidelines:
You're descended from someone who was alive in Italy after March 17, 1861.
The ancestor did not naturalize in another country before June 14, 1912.
The ancestor did not naturalize before the birth of descendants interested in how to get Italian citizenship.
If the direct-line Italian ancestor is a woman born before January 1, 1948, citizenship can only be claimed from her father's line.
No one in the family renounced their Italian citizenship.
You may also qualify if you are a non-Italian who married an Italian citizen.