Second Persian Empire may refer to either of two historical states:
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Parthian Empire
The Parthian Empire (), also known as the Arsacid Empire (), was a major Iranian political and cultural power in ancient Iran from 247 BC to 224 AD. Its latter name comes from its founder, Arsaces I, who led the Parni tribe in conqu ...
, an ethnic Parthian state in ancient Iran lasting from 247 BCE to 224 CE, sometimes considered to be an iteration of Persia
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Sasanian Empire
The Sasanian () or Sassanid Empire, officially known as the Empire of Iranians (, ) and also referred to by historians as the Neo-Persian Empire, was the last Iranian empire before the early Muslim conquests of the 7th-8th centuries AD. Name ...
, its Persian successor from 224 CE to 651 CE
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