Sergius or Sergia may refer to:
Sergius (name), including a list of people with the name, and variants Sergia gens, a Roman patrician gens Sergia (plant)
See also Patriarch Sergius (disambiguation) Pope Sergius (disambiguation) Saint Sergius (disambiguation) Sergius III (disambiguation) Sergius of Naples (disambiguation) Sergius and Bacchus, 4th century saints "Father Sergius", a short story by Leo Tolstoy, and two film adaptations Arch of the Sergii, an ancient Roman triumphal arch in Pula, Croatia