TheCoast Oregon Penutian languages are a proposed family of three small languages or language clusters on theOregon Coast that has moderate support.^[1] Although much of their similarity is demonstrably due tolanguage contact, linguists such as Scott DeLancey believe they may be genealogically related at a greater time depth. They are part of the much more hypotheticalPenutian proposal.^[2]

The Coast Oregon Penutian languages are:

• Alsean
  • Yaquina, spoken on the central Oregon coast around Yaquina Bay & along the Yaquina River (central Oregon coast) by theYaquina people
  • Alsea, spoken on the central Oregon coast aroundAlsea Bay and along theAlsea andYachats rivers by theAlsea people
• Siuslaw
  • Siuslaw dialect spoken on the central Oregon coast along theSiuslaw River and aroundSiltcoos Lake
  • Kuitsh dialect spoken on the central Oregon coast aroundWinchester Bay and along the lower Umpqua andSmith rivers.
• Coosan
  • possibly severalHanis dialects spoken along the southern Oregon coast in the vicinity ofCoos Bay and along theCoos River.
  • possibly one or twoMiluk dialects spoken along the southern Oregon coast around South Slough of Coos Bay and along the lowerCoquille River.

All Coast Oregon Penutian languages became extinct in the 20th century.

Below is a comparison of selected basic vocabulary items in Alsea, Coos, and Lower Umpqua (a Coosan language variety). The lexical data is fromLeo J. Frachtenberg's works.

gloss	Alsea[3]	Coos[4]	Lower Umpqua[5]
head	kusiʼntsi, ʟōkˑ	xwî´l̄uxᵘ	xwā´ka
hair	pelūʽʼpᴇlū, ʟōʼsin	xˑne´kˑ; yı̂´akᵘ	hī´qūⁱ
eye	hayaʼnīyustǃ, kˑǃīkˑ	xwa´lxwal	kōpx
ear	tskwaīʼsalyustǃ	kᵘha´n̄as	qa´kwīx
nose	tᴇsiʼn	tcūɬ	ʟᵒwa´sî
tooth	tǃᴇliʼl	qtsä	tʼîx
tongue	stilaʼkˑayustǃ	he´ˡlta	tʽǃa´lˑtʽǃalˑ
mouth	kxai	ye´es	ʟaa´
hand	tāʼmtᴇm	kˑe´ɬa	tcīʟ; ʟpīkᵘ
foot	yūⁿʼsalyustǃ	kxla	tsı̄kᵘ
breast	ɫkwa᷇ⁿ	gā 'nipple'	ɬqū´wa (of man)
meat	hatsīʼlāl	tǃeˣt	nı̄ʟ
blood	puʼstᴇx	wı̂´tı̂n	qā´wī
bone	qēʼkus	lā´makˑ (pl.)	tsnā´wî
person	hīʼtsʟᴇm	ma	hītc
name	ʟān, ɫaʼni	ɬn̻´nas	ɬīn
dog	tsqax, tsqēⁿx	kwī´yos < Jargon	cqaxtc < Siuslaw
fish	tsūdaīʼs		ɬtʼī´aⁱ̄
louse		täts; mî´tcîɬ	ta´wî
tree	kōts, kōʼxᵘ		ɬqaⁱ´ʽtū
leaf	kˑ'ēʼpau	ɬⁱnēlˑ	ʟǃīp
flower	hālēʼtxaū		tcāᵃxānᵋ
water	kˑiʼlū	xāᵃp	tcī
fire	tkᴇlɫtsǃīʼs, ʟkˑilīʼtǃa	tc!waɬ	ʟīya´aᵘ
stone	kˑlīl	kᵘɬī´yex	qayū´ʷⁱnts
earth	leʽwīʼ	ʟǃtā	ʟǃa´ᵃⁱ
salt	qaʼlōs	mî´tsǃlîs	hîlˑa´xwa
road	yāʼxalīᵋtǃ, xˑūʼlamīt'	he´wı̂lts	txaⁱnᵋ
eat	nūns-	qǃm-; ʟōᵘ-	ɬītǃ-
die	hask-, qan-	e´qe	xaū-
I	qan	n̻; nᴇx	nà
you	nīx	eᵋ	nı̄xᵃts

• Coast Oregon Penutian languages
• Penutian languages
• Indigenous languages of the Pacific Northwest Coast
• Indigenous languages of Oregon
• Proposed language families

• Articles with short description
• Short description matches Wikidata
• Families rejected by Glottolog
• Articles containing Alsea-language text
• Articles containing uncoded-language text
• Articles containing Siuslaw-language text