Theodoropolis (Θεοδωρόπολις) and Theodoroupolis (Θεοδωρούπολις) are the names of a number of ancient cities/towns and forts ('-polis' being Greek for city/town) either named after a saint or a Roman Emperor (Theodoros, Theodore or Theodora), notably :

• Theodoropolis in Arcadia, in Egypt, also a diocese.
• Theodoropolis in Europa, in the Roman province of Europa (now European Turkey), also a former diocese, and Catholic titular see.
• Euchaneia, a center of the veneration of Saint Theodore of Amasea a town near or identical with Euchaita in the Roman province or Pontus in Asia Minor).
• Former Dorostolon, renamed after Byzantine empress Theodora, wife of John I Tzimisces.
• Former Silistra in Thrace, renamed after military saint Theodore Stratelates.