Regions tracing their origins (or otherwise referenced) in Greco-Roman antiquity [in cases where ancient regions are extant, this table is limited to cases where the present-day regional names retain their original/ancient form].

(References: Herodotus' "Histories"; Thucydides' "Peloponnesian War"; Pausanias' "Description of Greece"; Lemprière's Bibliotheca Classica; Leverett's 1838 edition of the "Lexicon of the Latin Language"; Freeman's "The History of Sicily..."; et al.)

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Name	Adjective	Demonym
			colloquial
Acarnania	Acarnanian	Acarnanians
Achaea	Achaean	Achaeans
Aegina	Aeginetan	Aeginetans
Aethaea	Aethaean	Aethaeans
Aetolia	Aetolian	Aetolians
Andalusia	Andalusian	Andalusians
Apulia	Apulian	Apulians
Aquitania	Aquitanian	Aquitanians
Arcadia	Arcadian	Arcadians
Argos	Argive	Argives
Arretium	Arretine	Arretines
Athens	Athenian	Athenians
Bactria, Bactriana	Bactrian	Bactrians
Bavaria	Bavarian	Bavarians
Boeotia	Boeotian, Beotian	Boeotians, Beotians
Boiohaemum	Boius	Boii
Bosporus, Bosphorus	Bosporan, Bosphoran	Bosporans, Bosphorans
Bruttium	(Bruttus ?), Bruttian	Brutti, Bruttians
Byzantium	Byzantine	Byzantines
Calabria	Calabrian	Calabrians
Campania	Campanian	Campanians
Cantabria	Cantabrian	Cantabrians
Caria	Carian	Carians
Carthage	Carthaginian	Carthaginians
Carystus	Carystian	Carystians
Catalonia	Catalan, Catalonian	Catalans, Catalonians
Chalcis	Chalcidian	Chalcidians
Chios	Chian	Chians
Colchis	Colchian	Colchians
Colossae	Colossian	Colossians
Consentia	Consentian	Consentians
Corcyra	Corcyrean	Corcyreans
Corsica	Corsican	Corsicans
Crete	Cretan	Cretans
Croton	Crotonian	Crotonians
Cyclades	Cycladian	Cycladians
Cyprus	Cypriot, Cypriote	Cypriots, Cypriotes
Cyrenaica	Cyrenaic	Cyrenaics
Cyrene	Cyrenian	Cyrenians
Dacia	Dacian	Dacians
Dalmatia	Dalmatian	Dalmatians
Delos	Delian	Delians
Dodecanese	Dodecanesian	Dodecanesians
Edonia	Edonian	Edonians
Egesta	Egestan	Egestans
Eleusina or Eleusis	Eleusian, Eleusinian	Eleusians, Eleusinians
Elis or Eleia	Elian	Elians
Ephesus	Ephesian	Ephesians
Epidamnus or Epidamnos	Epidamnian	Epidamnians
Epidaurus	Epidaurian	Epidaurians
Epirus	Epirote	Epirotes
Eretria	Eretrian	Eretrians
Etruria	Etruscan	Etruscans
Euboea	Euboean	Euboeans
Galatia	Galatian	Galatians
Gallaecia	Gallaecus	Gallaeci
Gallia	Gaul	Gauls
Germania	Germanian, Germanus	Germanians, Germani
Iberia	Iberian	Iberians
Illyria	Illyrian	Illyrians
Ionia	Ionian	Ionians
Kalymnos	Kalymnian	Kalymnians
Kaulonia	Kaulonian	Kaulonians
Kefalonia	Kefalonian	Kefalonians
Knossos	Knossian	Knossians
Lakedaimon/ia or Lakedaemon/ia	Lakedaimonian or Lakedaemonian	Lakedaimonians or Lakedaemonians
Larissa	Larissan	Larissans
Latium	Latin	Latins
Leontini, Leontium	Leontinian	Leontinians
Lesbos	Lesbian	Lesbians
Locris	Locrian	Locrians
Lucania	Lucanian	Lucanians
Lydia	Lydian	Lydians
Macedonia	Macedonian	Macedonians
Maeonia	Maeonian	Maeonians
Mantineia	Mantinean	Mantineans
Marathon	Marathonian	Marathonians
Media	Median	Medes, Medians
Megara	Megaran	Megarans
Melite	Melitian	Melitians
Melos	Melian	Melians
Mesopotamia	Mesopotamian	Mesopotamians
Messenia	Messenian	Messenians
Miletus	Milesian	Milesians
Mithymna or Methymna	Methymnian	Methymnians
Moravia	Moravian	Moravians
Mycenae	Mycenaean	Mycenaeans
Mytilene	Mytilenean	Mytileneans
Naupactus or Nafpaktos	Naupactian	Naupactians
Naxos	Naxian	Naxians
Nisyros	Nisyrian	Nisyrians
Oea	Oean	Oeans
Olympia	Olympian	Olympians
Oiniades, Oiniadai	Oiniadan	Oiniadans
Orkney Islands	Orcadian	Orcadians
Paionia or Paeonia	Paeonian	Paeonians
Pamphylia	Pamphylian	Pamphylians
Paros	Parian	Parians
Patmos	Patmian	Patmians
Peloponnese	Peloponnesian	Peloponnesians
Pergamum	Pergamian	Pergamians
Persia	Persian	Persians
Philippi	Philippian	Philippians
Phlius	Phliasian	Phliasians
Phocis	Phocian	Phocians
Phoenicia	Phoenician	Phoenicians
Phrygia	Phrygian	Phrygians
Pisidia	Pisidian	Pisidians
Pontus	Pontian	Pontians
Pylos	Pylosian	Pylosians
Rhegion	Rhegian, Rhegine	Rhegians, Rhegines
Rhodes	Rhodian	Rhodians
Rhithymna, Rhithymnia, Rithymna	Rhithymnian	Rhithymnians
Rome	Roman	Romans
Sabinium	Sabine	Sabines
Salamis	Salaminian	Salaminians
Samnium	Samnite	Samnites
Samos	Samian	Samians
Sardinia	Sardinian, Sardi	Sardinians, Sardi
Sardis	Sardianus, Sardian	Sardiani, Sardians
Sarmatia	Sarmatian, Sarmata, or Sauromata	Sarmatians, Sarmatae, or Sauromatae
Scythia	Scytha, Scythian	Scythae, Scythians
Serrae, Serrhae	Serrean	Serreans
Sicily	Sicilian	Sicilians
Sicyon	Sicyonese	Sicyonese
Sidon, or Saïda	Sidonian	Sidonians
Silesia	Silesian	Silesians
Skopelos	Skopelitan	Skopelitans
Sparta	Spartan	Spartans
Suebia	Suebius	Suebi
Symi	Symian	Symians
Syracuse	Syracusan	Syracusans
Taras, Tarentum	Tarentine, Tarentumian	Tarentines, Tarentumians
Tegea	Tegean	Tegeans
Tenedos	Tenedian	Tenedians
Tenedos	Tenedian	Tenedians
Thasos	Thasian	Thasians
Thebes	Theban	Thebans
Thespis	Thespian	Thespians
Thessaly	Thessalian	Thessalians
Thrace	Thracian	Thracians
Thria	Thriasian	Thriasians
Thuria	Thuriat	Thuriats
Thurii	Thurian	Thurians
Trichonos	Trichonian	Trichonians
Troezen	Troezenian	Troezenians
Troy	Trojan	Trojans
Umbria	Umbrian	Umbrians
Xanthi	Xanthian	Xanthians
Zakynthos	Zakyntian	Zakyntians