Gnaeus Octavius Titinius Capito (- 1st century, - 2nd century) was a Roman eques, officer, and civil servant active during the first and second century AD.

A member of the Titinia gens, he served successfully in the army, later becoming secretary ab epistulis under the Emperors Domitian, Nerva and Trajan.^[2][3] He ended his career of civil servant becoming Praefectus vigilum.^[2] He was a friend of Pliny the Younger,^[3] with whom he kept up a correspondence.^[2] We are left with a letter addressed by him to Pliny, where he advised his friend to devote himself to history, and with the answer of Pliny.^[2][4] He also wrote about the deaths of famous men,^[3] and was a supporter of literates.^[2] Moreover, he honored republican heroes by keeping in his house statues of Cato Uticensis, Brutus, and Cassius^[2][3] bearing elogia written by himself.^[5]

• Guy Edward Farquhar Chilver (2012). "Gnaeus Octavius Titinius Capito". The Oxford Classical Dictionary (4 ed.). Oxford: Oxford University Press. ISBN 9780199545568.
• "Elogium (1)". Paulys Realencyclopädie der classischen Altertumswissenschaft (in German). Vol. 5. Leipzig: Georg Wissowa. 1905. pp. 2440–2452.