| Language/dialect | Family | Date of extinction | Region | Ethnic group |
| Aeolic Greek | Indo-European | 300 BC | Aeolis, Boeotia, Lesbos, Thessaly | Aeolians |
| Aequian | Indo-European | 200s BC | East-central Italy | Aequi |
| Akkala Sámi | Uralic | 29 December 2003 | Southwest Kola Peninsula | Akkala Sámi |
| Alavese | Basque | | Álava | Alavese Basques |
| Ancient Belgian | Indo-European | | Nordwestblock | Belgae |
| Ancient Macedonian | Indo-European | 0–300s AD | Macedonia | Ancient Macedonians |
| Andalusi Arabic | Afroasiatic | 1600s AD | Al-Andalus | Andalusi Muslims |
| Andalusi Romance | Indo-European | 1300s AD | Al-Andalus | Mozarabs and Muladí |
| Antrim Irish | Indo-European | 25 February 1983 | County Antrim | Irish |
| Arcadocypriot Greek | Indo-European | 300 BC | Arcadia and Cyprus | Arcadocypriot Greeks |
| Armeno-Kipchak | Turkic | 1600 AD | Crimea | Crimean Armenians |
| Army Slavic | German–Czech pidgin | 1918 AD | Austria-Hungary | Austro-Hungarian Army |
| Arran Gaelic | Indo-European | 1977 AD | Isle of Arran | Arran Gaels |
| Auregnais | Indo-European | 1960s AD | Alderney | Channel Islanders of Alderney |
| Basque–Icelandic pidgin | Basque–Icelandic pidgin | 1600s AD | Westfjords | Basque whalers and Icelanders |
| Batz-sur-Mer Breton | Indo-European | 1960s | Batz-sur-Mer | Bretons |
| Bjarmian | Uralic | early 2nd millennium | Northern Dvina | Bjarmia |
| Bohemian Romani | Indo-European | 1939–1945 | Bohemia | Bohemian Romani |
| Borgarmålet | Swedish–Sámi pidgin | 1700s AD | Swedish Sápmi | Swedes and Sámi |
| British Latin | Indo-European | 700s AD | Roman Britain; later Anglo-Saxon England | British Romans |
| Bulgar | Turkic | 1200s AD | Danubian Bulgaria and Volga Bulgaria | Bulgars |
| Buri | Indo-European | | western Slovakia | Buri tribe |
| Burgundian | Indo-European | 500s AD | Kingdom of the Burgundians | Burgundians |
| Camunic | Unclassified | 500–0s BC | Val Camonica | Camunni |
| Capraiese | Indo-European | 1900s | Capraia Isola | Capraia people |
| Celtiberian | Indo-European | 100s AD | Iberia | Celtiberians |
| Cimmerian | Indo-European | 620–580s BC | North Caucasus | Cimmerians |
| Cisalpine Gaulish | Indo-European | 50s BC | Cisalpine Gaul | Cisalpine Gauls |
| Community of Villages Aragonese | Indo-European | | Kingdom of Aragon | Aragonese |
| Crimean Gothic | Indo-European | 1700s AD | Crimea | Crimean Goths |
| Cromarty | Indo-European | 2 October 2012 | Cromarty | Scots |
| Cuman | Turkic | 1770 AD | Cumania and Hungary | Cumans |
| Cumbric | Indo-European | 1100s AD | Cumbria | Cumbrians |
| Curonian | Indo-European | 1500s AD | Courland | Curonians |
| Dacian | Indo-European | 500s AD | Dacia | Dacians |
| Dalmatian | Indo-European | 10 June 1898 | Dalmatia | Dalmatians |
| Dardanian | Indo-European | | Kingdom of Dardania | Dardani |
| Deeside Gaelic | Indo-European | 18 March 1984 | Aberdeenshire | Gaels of Aberdeenshire |
| East Sutherland Gaelic | Indo-European | 2020 | Sutherland | Gaels, Scottish people |
| Eastern Navarrese | Basque | 1991 | Navarre | Basques |
| Ebro Valley Aragonese | Indo-European | 1600s AD | Ebro Valley | Aragonese |
| Eiderstedt Frisian | Indo-European | mid-1800s AD | Eiderstedt | Eiderstedt Frisians |
| Elymian | Indo-European | 500–0s BC | Western Sicily | Elymians |
| Eteocretan | Unclassified | 200s BC | Crete | Eteocretans |
| Eteocypriot | Unclassified | 300s BC | Cyprus | Eteocypriots |
| Etruscan | Tyrsenian | 0s AD | Etruria | Etruscans |
| Faliscan | Indo-European | 100s BC | Northern Lazio | Falisci |
| Fingallian | Indo-European | 1840–1860s | Fingal | Fingallians |
| Franco-Italian | Indo-European | 1300s AD | Northern Italy | North Italian writers |
| Gallaecian | Indo-European | | Gallaecia | Gallaeci |
| Galwegian Gaelic | Indo-European | 1760 AD | Galloway | Galwegian Gaels |
| Gaulish | Indo-European | 500s AD | Gaul | Gauls |
| Gelonian | Indo-European | | Gallaecia | Vorskla |
| Gepidian | Indo-European | 600s AD | Kingdom of the Gepids | Gepids |
| Golyad | Indo-European | 1100s AD | Protva basin | Eastern Galindians |
| Gothic | Indo-European | 1700s AD | Throughout Europe | Goths |
| Harlingerland Frisian | Indo-European | 1700s AD | Harlingerland | East Frisians |
| Hernican | Indo-European | 1000–0s BC | Southeast Latium | Hernici |
| Herulian | Indo-European | after 500s AD | Middle Danube | Heruli |
| Hiberno-Latin | Indo-European | 1100s AD | Ireland | Irish monks |
| Hunnic | Unclassified | 400s AD | Hunnic Empire | Huns |
| Iazychie | Indo-European | 1900s | Halychyna, Bukovina, Zakarpattia | Ukrainian and Carpatho-Rusyn Moskvophiles |
| Iberian | Unclassified | 0–500s AD | Iberia | Iberians |
| Illyrian | Indo-European | 100s AD | Illyria | Illyrians |
| Istrian Albanian | Indo-European | 1800s AD | Istria | Istrian Albanians |
| Jassic | Indo-European | 1400s AD | Jászság | Jász |
| Judaeo-Aragonese | Indo-European | after 1492 AD | Aragon | Aragonese Jews |
| Judaeo-Catalan | Indo-European | after 1492 AD | Catalan Countries | Catalonian Jews |
| Judaeo-Piedmontese | Indo-European | | Piedmont | Piedmontese Jews |
| Judaeo-Portuguese | Indo-European | 1800–1820s AD | Portugal | Portuguese Jews |
| Judeo-Gascon | Indo-European | | Gascony | Spanish and Portuguese Jews |
| Judeo-Livornese | Indo-European | After August 18, 1962 | Livorno | Livornese Jews |
| Judeo-Mantuan | Indo-European | 20th century | Mantua | Mantuan Jews |
| Judeo-Provençal | Indo-European | mid 20th-century | Provence | Provençal Jews |
| Judeo-Salentinian | Indo-European | | Salento | Salento Jews |
| Judeo-Sicilian Greek | Indo-European | | Sicily | Sicilian Jews |
| Judeo-Venetian | Indo-European | 1900s | Venice | Venetian Jews |
| Kainuu Sámi | Uralic | 1700s AD | Kainuu | Kainuu Sámi |
| Karamanli Turkish | Turkic | 1800s | Greece, Bulgaria and North Macedonia | Karamanlides |
| Kemi Sámi | Uralic | by 1900s | Southern Finnish Lapland | Kemi Sámi |
| Khazar | Turkic | 1100s AD | Khazar Khaganate | Khazars |
| Klezmer-loshn | Indo-European | 1900s | Eastern Europe | Klezmorim |
| Knaanic | Indo-European | 1600s AD | Central Europe | West Slavic Jews |
| Kraasna | Uralic | 1935-1939 AD | Krasnogorodsk | Kraasna Estonians |
| Krevinian | Uralic | 1800s AD | Latvia | Kreevins |
| Lachoudisch | Indo-European | 2022 AD | Schopfloch | Jews of Bavaria |
| Laiuse Romani | Mixed Romani–Estonian | 1940s AD | Laiuse | Romani of Laiuse |
| Lanuvian | Indo-European | 500s BC | Lanuvium | Lanuvians |
| Leinster Irish | Indo-European | | Leinster | Irish of Leinster |
| Leivu | Uralic | 1988 AD | Gauja | Gauja Estonians |
| Lemnian | Tyrsenian | 400s BC | Lemnos | Lemnians |
| Lepontic | Indo-European | 0s BC | Cisalpine Gaul and Raetia | Lepontii |
| Liburnian | Indo-European | 200s BC-300s AD | Liburnia | Liburnians |
| Ligurian | Unclassified | 100s AD | Liguria | Ligures |
| Locrian Greek | Indo-European | | Locris | Locrians |
| Lombardic | Indo-European | 800s AD | Pannonia and Italy | Lombards |
| Lotegorisch | Indo-European | | Leiningerland | Jews of Rhineland-Palatinate |
| Ludza | Uralic | 2006 or 2014 | Latgale | Ludza Estonians |
| Lusitanian | Indo-European | 100s AD | Lusitania | Lusitanians |
| Malkh | Northeast Caucasian | | North Caucasus | Malkh |
| Marsian | Indo-European | 150s BC | Marsica | Marsi |
| Marrucinian | Indo-European | 200s BC | Chieti | Marrucini |
| Merya | Uralic | by 1700s AD | Upper Volga region | Meryans |
| Meshchera | Uralic | 1500s AD | Meshchera Lowlands | Meshchera |
| Messapic | Indo-European | 100s BC | Salento | Messapians |
| Minoan | Unclassified | 1450s BC | Crete | Minoans |
| Moselle Romance | Indo-European | 1000s AD | The Moselle | People along the Moselle |
| Muromian | Uralic | 900s AD | Oka basin | Muromians |
| Mycenaean Greek | Indo-European | 1200s BC | Mycenaean Greece | Mycenaean Greeks |
| Mysian | Indo-European | 0s BC | Balkans | Mysians |
| Navarrese Romance | Indo-European | 1600s AD | Kingdom of Navarre | Navarrese |
| Noric | Indo-European | 100s AD | Noricum | Norici |
| Norn | Indo-European | 1850 AD | Northern Isles and Caithness | Norse settlement of Northern Isles and Caithness |
| North Picene | Unclassified | 1000–0s BC | North Picenum | North Picentes |
| Northern Manx | Indo-European | 1940s AD | Northern part of the Isle of Man | Northern Manx |
| Oenotrian | Indo-European | 400s BC | Southern Italy | Oenotrians |
| Old Novgorod | Indo-European | 1500s AD | Novgorod Republic | Novgorodians |
| Old Prussian | Indo-European | 1700s AD | Prussia | Old Prussians |
| Old Riojan | Indo-European | 1200s AD | La Rioja | Riojans |
| Old South Frisian | Indo-European | | Germany or Netherland? | Old South Frisia |
| Oscan | Indo-European | 0s AD | Campania and Latium adiectum | Osci |
| Paduan | Indo-European | 1600s AD | Padua | Paduans |
| Paelignian | Indo-European | 100s BC | Valle Peligna | Paeligni |
| Paeonian | Indo-European | | Paeonia | Paeonians |
| Paleo-Corsican | Unclassified | | Corsica | Ancient Corsi |
| Paleo-Sardinian | Unclassified | 100s AD | Sardinia | Nuragic peoples |
| Pamphylian Greek | Indo-European | | Pamphylia | Pamphylians |
| Pannonian Avar | Unclassified | 800s AD | Pannonian Basin | Pannonian Avars |
| Pannonian Romance | Indo-European | 1100s AD | Pannonia | Latin Pannonians |
| Pantellerian Arabic | Afroasiatic | 1700s AD | Pantelleria | Pantellerians |
| Pecheneg | Turkic | 1100s AD | Eastern Europe | Pechenegs |
| Pelasgian | Unclassified | | Aegean Islands | Pelasgians |
| Phrygian | Indo-European | after 400 AD | Balkans | Bryges |
| Pictish | Indo-European | 1000s AD | Northern Scotland | Picts |
| Polabian | Indo-European | 3 October 1756 AD | Northeastern Germany | Polabian Slavs |
| Pontic Scythian | Indo-European | 0s BC | Scythians | Pontic–Caspian steppe |
| Pomeranian Baltic | Indo-European | 1st millenium BC | Baltic Pomerania | Pomeranian Balts |
| Praenestinian | Indo-European | 500s BC | Palestrina | Praenestinians |
| Prague German | Indo-European | after 1945 | Prague | Prague Germans |
| Pre-Samnite | Indo-European | 500s BC | Campania | Pre-Samnites |
| Punic | Afroasiatic | 600s AD | Iberia, Malta, Sicily, Sardinia and the Balearic Islands | Carthaginians |
| Rhaetic | Tyrsenian | 0s BC | Raetia | Raeti |
| Rotvælsk | Indo-European | 1900s | Denmark | Natmændsfolk |
| Rugian | Indo-European | | Lower Austria | Rugii |
| Russenorsk | Russian–Norwegian pidgin | 1900s | Northern Norway | Pomors and Norwegians |
| Sabine | Indo-European | 300s-200s BC | Sabina | Sabines |
| Sabir | Romance-based Pidgin | 1800s AD | Mediterranean Basin | Medieval traders and Crusaders |
| Salaca Livonian | Uralic | 1868 | Salaca | Livonians |
| Selonian | Indo-European | 1500s AD | Selonia | Selonians |
| Semigallian | Indo-European | 1500s AD | Semigallia | Semigallians |
| Shirvani Arabic | Afroasiatic | 1850–1890s AD | Shirvan | Shirvani |
| Sicanian | Unclassified | by 300s BC | Central Sicily | Sicani |
| Siculian | Indo-European | 300s BC | Eastern Sicily | Sicels |
| Sidicini | Indo-European | | Sidicinum | Sidicini |
| Skalvian | Indo-European | 1200s AD | Scalovia | Skalvians |
| Skirian | Indo-European | | North of the Middle Danube | Sciri |
| Slovincian | Indo-European | 1900s | Northwestern Kashubia | Slovincians |
| Solombala English | English–Russian pidgin | 1800s AD | Solombala Shipyard | English and Russian traders |
| Sorothaptic | Indo-European | 100s AD | Catalan Countries | Urnfield culture |
| South Picene | Indo-European | 300s BC | South Picenum | South Picentes |
| Southern Goesharde Frisian | Indo-European | 1981 | Southern Goesharde | Frisians of South Goesharde |
| Sudovian | Indo-European | 1500s AD | Yotvingia | Yotvingians |
| Suebian | Indo-European | 500s AD | Elbe basin and northwestern Iberia | Suebi |
| Tartessian | Unclassified | 100s BC | Tartessos | Tartessians |
| Thracian | Indo-European | 500s AD | Thracia | Thracians |
| Traveller Danish | Mixed Danish–Romani | early 20th century | Denmark | Romani |
| Ubykh | Northwest Caucasian | 7 October 1992 | Ubykhia | Ubykh |
| Umbrian | Indo-European | 0s BC | Umbria | Umbri |
| Upgant Frisian | Indo-European | mid-1600s | Upgant-Schott | Frisians of Upgant-Schott |
| Valencian Aragonese | Indo-European | 1400s AD | Kingdom of Valencia | Valencians |
| Vandalic | Indo-European | 500s AD | Vandal kingdoms | Vandals |
| Värmland Savonian | Uralic | 1969 AD | Värmland | Forest Finns |
| Venetic | Indo-European | 0s BC | Veneto | Adriatic Veneti |
| Vestinian | Indo-European | 100s BC | Abruzzo | Vestini |
| Volscian | Indo-European | 200s BC | Volscia | Volsci |
| Wangerooge Frisian | Indo-European | 22 November 1950 | Wangerooge | Wangerooge Frisians |
| Welsh Romani | Indo-European | 1950 AD | Wales | Romani |
| West Galindian | Indo-European | 1300s AD | Prussia | Western Galindians |
| Wursten Frisian | Indo-European | 1810–1830s AD | Land Wursten | Frisians of Land Wursten |
| Yola | Indo-European | 1800s AD | Forth and Bargy | Irish of Forth and Bargy |
| Zarphatic | Indo-European | 1300s AD | Northern France and western Germany | French Jews |