Sasanian Armenia, also known as Persian Armenia and Persarmenia (Armenian: Պարսկահայաստան – Parskahayastan), may either refer to the periods where Armenia (Middle Persian: 𐭠𐭫𐭬𐭭𐭩‎ – Armin) was under the suzerainty of the Sasanian Empire, or specifically to the parts of Armenia under its control such as after the partition of 387 AD when parts of western Armenia were incorporated into the Byzantine Empire while the rest of Armenia came under Sasanian suzerainty whilst maintaining its existing kingdom until 428.

In 428, Armenian nobles petitioned Bahram V to depose Artaxias IV (r. 422); Bahram V (r. 420–438) abolished the Kingdom of Armenia and appointed Veh Mihr Shapur as marzban (governor of a frontier province, “margrave”) of the country, which marked the start of a new era known as the Marzpanate period (Armenian: Մարզպանական Հայաստան – Marzpanakan Hayastan), a period when marzbans, nominated by the Sasanian emperor, governed eastern Armenia, as opposed to the western Byzantine Armenia which was ruled by several princes, and later governors, under Byzantine suzerainty. The Marzpanate period ended with the Arab conquest of Armenia in the 7th century, when the Principality of Armenia was established. An estimated three million Armenians were under the influence of the Sasanian marzpans during this period.