Titius was the nomen for the ancient Roman gens Titia.
- Gaius Titius, orator and tragic writer 2nd century BC, mentioned by Cicero
- Marcus Titius, suffect consul 31 BC
- Titius Aristo, Roman jurist ca 100
- L. Epidius Titius Aquilinus, consul 125
- L. Titius Plautius Aquilinus, consul 162
Johann Daniel Titius was the 18th century astronomer that discovered the Titius-Bode law.
Gerhard Titius was a theologian of the 17th century.
