| Language or dialect name
|
Language family
|
Extinction date
|
Notes
|
References
|
| Achumawi
|
Palaihnihan
|
2013
|
Revival attempts underway
|
|
| Adai
|
unclassified
|
19th century
|
|
|
| Ais
|
unclassified
|
18th century
|
|
|
| Carolina Algonquian/Pamlico/Croatoan
|
Algic
|
1790s
|
|
|
| Alsea/Yaquina
|
Language isolate
|
1942
|
Alsea and Yaquina are thought to be either two related languages or two dialects of the same language
|
|
| Apalachee
|
Muskogean
|
18th century
|
Revival attempts underway
|
|
| Aranama
|
unclassified
|
19th century
|
|
|
| Atakapa
|
Language isolate
|
20th century
|
|
|
| Atsina/Gros Ventre
|
Algic
|
2007
|
Revival attempts underway
|
|
| Atsugewi
|
Palaihnihan
|
1988
|
|
|
| Awaswas
|
Utian
|
19th century
|
formerly known as "Santa Cruz"
|
|
| Barbareño/Ineseño
|
Chumashan
|
1965
|
Revival attempts underway. Barbareño and Ineseño may be related dialects of the same language or closely related languages
|
|
| Bidai
|
unclassified
|
19th century
|
|
|
| Biloxi
|
Siouan
|
1930s
|
|
|
| Caddo/Hasí꞉nay
|
Caddoan
|
14 July 2025
|
Revival attempts underway
|
[5]
|
| Cahto/Kato
|
Na-Dene
|
1960s
|
|
|
| Cahuilla
|
Uto-Aztecan
|
by 2024
|
Revival attempts underway
|
|
| Calusa
|
unclassified
|
19th century
|
|
|
| Catawba
|
Siouan
|
1959
|
Revival attempts underway
|
|
| Cayuse
|
Language isolate
|
1930s
|
|
|
| Chalon
|
Utian
|
19th century
|
|
|
| Upper Chehalis
|
Salishan
|
2001
|
Revival attempts underway
|
|
| Lower Chehalis
|
Salishan
|
1990s
|
|
|
| Chemakum/Chimakum/Chimacum
|
Chimakuan
|
19th century
|
|
| Chico/Valley Maidu
|
Maiduan
|
21st century
|
|
|
| Chimariko
|
Language isolate
|
1950s
|
|
|
| Chitimacha/Sitimaxa
|
Language isolate
|
1940
|
Revival attempts underway
|
|
| Chiwere/Iowa-Otoe-Missouria/Báxoje-Jíwere-Ñút'achi
|
Siouan
|
1996
|
Revival attempts underway
|
|
| Chochenyo
|
Utian
|
1934
|
Revival attempts underway
|
|
| Coahuilteco
|
Language isolate
|
18th century
|
|
|
| Columbia-Moses
|
Salishan
|
2 May 2023
|
Revival attempts underway
|
[6]
|
| Cowlitz
|
Salishan
|
20th century
|
Revival attempts underway
|
|
| Cruzeño/Isleño/Island Chumash
|
Chumashan
|
1915
|
|
|
| Cupeño
|
Uto-Aztecan
|
1987
|
|
|
| Esselen
|
Language isolate
|
19th century
|
|
|
| Erie
|
Iroquoian
|
17th century
|
|
|
| Etchemin
|
Algic
|
17th century
|
|
|
| Eyak
|
Na-Dene
|
2008
|
Revival attempts underway
|
|
| Galice/Galice-Applegate/Upper Rogue River
|
Na-Dene
|
1963
|
|
|
| Halchidhoma/Xalychidom
|
Yuman–Cochimí
|
(date missing)
|
|
|
| Hanis/Coos
|
Coosan
|
1972
|
|
|
| Holikachuk
|
Na-Dene
|
2012
|
|
|
| Houma
|
Muskogean
|
after 1907
|
Revival attempts underway
|
|
| Central Kalapuya
|
Kalapuyan
|
1954
|
|
|
| Kansa
|
Siouan
|
1982
|
|
|
| Karankawa
|
unclassified
|
1858
|
|
|
| Karkin
|
Utian
|
1950s
|
|
|
| Kathlamet
|
Chinookan
|
1930s
|
|
|
| Kiksht/Upper Chinook/Columbia Chinook/Wasco-Wishram
|
Chinookan
|
2012
|
|
|
| Kitanemuk
|
Uto-Aztecan
|
1940s
|
|
|
| Kitsai
|
Caddoan
|
1940
|
|
|
| Klallam/Clallam/Ns'Klallam/S'klallam
|
Salishan
|
2014
|
Revival attempts underway
|
|
| Klamath/Klamath–Modoc/Lutuamian
|
Plateau Penutian
|
2003
|
Revival attempts underway
|
|
| Konomihu
|
Shastan
|
1940s
|
|
|
| Kwalhioqua-Clatskanie
|
Na-Dene
|
20th century
|
|
|
| Loup
|
Algic
|
18th century
|
|
|
| Lower Chinook
|
Chinookan
|
1930s
|
|
|
| Luiseño
|
Uto-Aztecan
|
2010s
|
|
|
| Lushootseed
|
Salishan
|
2008
|
Revival attempts underway
|
|
| Maidu
|
Maiduan
|
2007
|
Revival attempts underway
|
|
| Makah
|
Wakashan
|
2002
|
Revival attempts underway
|
|
| Mandan
|
Siouan
|
2016
|
Revival attempts underway
|
|
| Massachusett/Natick/Wôpanâak/Pokanoket/Nonantum/Indian
|
Algic
|
19th century
|
Revival attempts underway. As of 2014, 5 children are native speakers, 15 are proficient second-language speakers and 500 are adult second-language learners.[7][8]
|
|
| Mattole/Mattole-Bear River
|
Na-Dene
|
1930s
|
|
|
| Meherrin
|
Iroquoian
|
18th century
|
|
|
| Miami-Illinois
|
Algic
|
20th century
|
Revival attempts underway
|
|
| Miluk/ Lower Coquille
|
Coosan
|
1939
|
|
|
| Mitchigamea
|
Siouan
|
18th century
|
|
|
| Bay Miwok
|
Utian
|
(date missing)
|
|
|
| Coast Miwok
|
Utian
|
1970
|
|
|
| Lake Miwok
|
Utian
|
1990s
|
|
|
| Northern Sierra Miwok
|
Utian
|
1990s
|
|
|
| Plains Miwok
|
Utian
|
1990s
|
|
|
| Mohican/Mahican
|
Algic
|
1940s
|
Revival attempts underway
|
|
| Mohegan-Pequot/Mohegan-Pequot-Montauk/Secatogue/Shinnecock-Poosepatuck
|
Algic
|
1908
|
Revival attempts underway
|
|
| Molala
|
Plateau Penutian
|
1958
|
|
|
| Moneton
|
Siouan
|
late 17th century
|
|
|
| Mutsun
|
Utian
|
1930
|
Revival attempts underway
|
|
| Nanticoke/Piscataway
|
Algic
|
1840s
|
Revival attempts underway. Nanticoke and Piscataway may be related dialects of the same language or closely related languages
|
|
| Nansemond
|
unclassified
|
before 20th century
|
May have been Algic
|
|
| Narragansett
|
Algic
|
18th-19th century
|
|
|
| Natchez
|
Language isolate
|
1957
|
Revival attempts underway
|
|
| Nawathinehena
|
Algic
|
19th century
|
|
|
| Nicoleño
|
Uto-Aztecan
|
1853
|
|
|
| Nisenan
|
Maiduan
|
2000s
|
Revival attempts underway
|
|
| Nooksack
|
Salishan
|
1988
|
Revival attempts underway
|
|
| Nomlaki
|
Wintuan
|
20th century
|
|
|
| Northern Kalapuyan
|
Kalapuyan
|
1937
|
|
|
| Nottoway/Cheroenhaka
|
Iroquoian
|
1838
|
Revival attempts underway
|
|
| Obispeño
|
Chumashan
|
1917
|
|
|
| Ofo
|
Siouan
|
20th century
|
|
|
| Okwanuchu
|
Shastan
|
20th century
|
|
|
| Osage
|
Siouan
|
3 November 2005
|
As of 2009, 15-20 2L speakers and ongoing revival
|
[9][10]
|
| Pamunkey
|
unclassified
|
before 20th century
|
May have been Algic
|
|
| Piro Pueblo
|
Tanoan
|
1900
|
|
|
| Plains Apache
|
Na-Dene
|
2008
|
|
|
| Lipan Apache
|
Na-Dene
|
early 21st century
|
Presumely
|
|
| Central Pomo
|
Pomoan
|
before 2000
|
|
|
| Eastern Pomo/Clear Lake Pomo
|
Pomoan
|
2007
|
Revival attempts underway
|
|
| Northern Pomo
|
Pomoan
|
2005
|
Revival attempts underway
|
|
| Northeastern Pomo
|
Pomoan
|
1961
|
|
|
| Southern Pomo
|
Pomoan
|
2014
|
Revival attempts underway
|
|
| Powhatan/Virginia Algonquian
|
Algic
|
18th century
|
|
|
| Purisimeño
|
Chumashan
|
early 20th century
|
|
|
| Quapaw
|
Siouan
|
19 April 2022
|
|
[11]
|
| Quileute
|
Chimakuan
|
1999
|
|
|
| Quinault
|
Salishan
|
1996
|
Revival attempts underway
|
|
| Quiripi/Mattabesic/Quiripi-Unquachog/Quiripi-Naugatuck/Wampano
|
Algic
|
20th century
|
|
|
| Ramaytush
|
Utian
|
1915
|
|
|
| Rumsen/Rumsien/San Carlos Costanoan/Carmeleno
|
Utian
|
1939
|
|
|
| Salinan
|
Language isolate
|
1958
|
|
|
| Scahentoarrhonon
|
Iroquoian
|
approx. 1652
|
|
|
| Serrano
|
Uto-Aztecan
|
2002
|
Revival attempts underway
|
|
| Shasta
|
Shastan
|
20th century
|
|
|
| New River Shasta
|
Shastan
|
1926
|
|
|
| Siuslaw
|
Language isolate
|
1960
|
|
|
| Southern Patwin
|
Wintuan
|
(date missing)
|
|
|
| Susquehannock/Conestoga
|
Iroquoian
|
18th century
|
|
|
| Taensa
|
Language isolate
|
late 19th century
|
Probably Natchez dialect.
|
|
| Takelma
|
Language isolate
|
1934
|
|
|
| Tamien
|
Utian
|
(date missing)
|
|
|
| Tataviam
|
Uto-Aztecan
|
1916
|
|
|
| Tawasa
|
Language isolate
|
18th century
|
Possibly Timucuan dialect.
|
|
| Tillamook
|
Salishan
|
1972
|
|
|
| Timucua
|
Language isolate
|
18th century
|
|
|
| Tongva/Gabrielino/Gabrieleño
|
Uto-Aztecan
|
20th century
|
Revival attempts underway
|
|
| Tonkawa
|
Language isolate
|
1940s
|
|
|
| Tübatulabal
|
Uto-Aztecan
|
2008
|
Revival attempts underway[12]
|
|
| Tunica/Luhchi Yoroni/Tonica/Yuron
|
Language isolate
|
1948
|
Revival attempts underway
|
|
| Tuscarora
|
Iroquoian
|
2020
|
|
|
| Tutelo/Tutelo–Saponi
|
Siouan
|
1982
|
|
|
| Tututni/(Lower) Rogue River/Upper Coquille/Nuu-wee-ya
|
Na-Dene
|
1983
|
Revival attempts underway
|
|
| Twana/Skokomish
|
Salishan
|
1980
|
|
|
| Upper Umpqua
|
Na-Dene
|
1950s
|
|
|
| Unami
|
Algic
|
2002
|
|
|
| Ventureño
|
Chumashan
|
20th century
|
|
|
| Wailaki/Eel River Athabaskan
|
Na-Dene
|
1960s
|
|
|
| Wappo
|
Yuki–Wappo
|
1990
|
|
|
| Wenro
|
Iroquoian
|
17th century
|
|
|
| Wichita
|
Caddoan
|
2016
|
|
|
| Wintu
|
Wintuan
|
2003
|
Revival attempts underway
|
|
| Wiyot/Wishosk/Soulatluk
|
Algic
|
1962
|
Revival attempts underway
|
|
| Woccon
|
Siouan
|
early 18th century
|
Revival attempts underway
|
|
| Yana/Yanan
|
Language isolate
|
1916
|
|
|
| Yoncalla/Southern Kalapuya/Yonkalla
|
Kalapuyan
|
1930s
|
|
|
| Yuchi
|
Language isolate
|
August 27, 2021
|
Revival attempts underway
|
|
| Yuki/Ukomno'm
|
Yuki–Wappo
|
1983
|
|
|
| Yurok/Chillula/Mita/Pekwan/Rikwa/Sugon/Weitspek/Weitspekan
|
Algic
|
2013
|
Revival attempts underway
|
|