Trajanopolis or Traianopolis ( Traianoupolis) may refer to several cities named after Trajan:
Traianopolis in Cilicia, a former name of Gazipaşa, Turkey Traianopolis in Phrygia, a former city in Turkey Traianopolis in Thrace, a city in Greece
See also Augusta Traiana, a Roman city on the site of present-day Stara Zagora, Bulgaria