Mokissos or Mokisos () or Mokison (Μωκισόν) was a town of ancient Cappadocia. The Romans called the city Mocisus or Mocissus, and Mocisum, and after the city was rebuilt by the Byzantine Emperor Justinian (527-565), it was renamed Justinianopolis (Ἰουστινιανούπολις).
Mokissos, a town of ancient Cappadocia, was designated by the Romans as Mocisus or Mocissus. Later, after restoration by Emperor Justinian, it was renamed Justinianopolis.