Lucius Aurelius Verus (15 December 130 – January/February 169) was Roman emperor from 161 until his death in 169, alongside his adoptive brother Marcus Aurelius. He was a member of the Nerva–Antonine dynasty. Verus' succession together with Marcus Aurelius marked the first time that the Roman Empire was ruled by more than one emperor simultaneously, an increasingly common occurrence in the later history of the Empire.

Born on 15 December 130, he was the eldest son of Lucius Aelius Caesar, first adopted son and heir to Hadrian. Raised and educated in Rome, he held several political offices prior to taking the throne. After his biological father's death in 138, he was adopted by Antoninus Pius, who was himself adopted by Hadrian. Hadrian died later that year, and Antoninus Pius succeeded to the throne. Antoninus Pius would rule the empire until 161, when he died, and was succeeded by Marcus Aurelius, who later raised his adoptive brother Verus to co-emperor.

As emperor, the majority of his reign was occupied by his direction of the war with Parthia which ended in Roman victory and some territorial gains. After initial involvement in the Marcomannic Wars, he fell ill and died in 169. He was deified by the Roman Senate as the Divine Verus (Divus Verus).

The co-emperors' early reign proceeded smoothly. Marcus Aurelius was able to give himself wholly to philosophy and the pursuit of popular affection. Some minor troubles cropped up in the spring; there would be more later. In the spring of 162, the Tiber flooded over its banks, destroying much of Rome. It drowned many animals, leaving the city in famine. Marcus and Lucius gave the crisis their personal attention.  In other times of famine, the emperors are said to have provided for the Italian communities out of the Roman granaries.

Over the winter of 161–62, as troubling news arrived—a rebellion was brewing in Syria—it was decided that Lucius should direct the Parthian War in person. He was stronger and healthier than Marcus, the argument went, more suited to military activity. Lucius's biographer suggests ulterior motives: to restrain Lucius's debaucheries, to make him thrifty, to reform his morals by the terror of war, to realize that he was an emperor. Whatever the case, the senate gave its assent, and Lucius left. Marcus remained in Rome; the city "demanded the presence of an emperor."

After the war Verus continued with his glamorous lifestyle and kept the troupe of actors and favorites with him. He had a tavern built in his house, where he celebrated parties with his friends until dawn. He also enjoyed roaming around the city among the population, without acknowledging his identity. The games of the circus were another passion in his life, especially chariot racing. Marcus Aurelius disapproved of his conduct but, since Verus continued to perform his official tasks with efficiency, there was little that he could do.

In the spring of 168 war broke out in the Danubian border when the Marcomanni invaded the Roman territory. This war would last until 180, but Verus did not see the end of it. In 168, as Verus and Marcus Aurelius returned to Rome from the field, Verus fell ill with symptoms attributed to food poisoning, dying after a few days in 169. However, scholars believe that Verus may have been a victim of smallpox, as he died during a widespread epidemic known as the Antonine Plague.