Domitia Longina was a Roman empress and wife to the Roman emperor Domitian. She was the youngest daughter of the general and consul Gnaeus Domitius Corbulo. Domitia divorced her first husband, Lucius Aelius Lamia Plautius Aelianus in order to marry Domitian in AD 71. The marriage produced only one son, whose early death is believed to have been the cause of a temporary rift between Domitia and her husband in 83. She became the empress upon Domitian's accession in 81, and remained so until his assassination in 96. She is believed to have died sometime between AD 126 and 130.

Domitian was Roman emperor from 81 to 96. The son of Vespasian and the younger brother of Titus, his two predecessors on the throne, he was the last member of the Flavian dynasty. Described as "a ruthless but efficient autocrat", his authoritarian style of ruling put him at sharp odds with the Senate, whose powers he drastically curtailed.