Northern Kalapuya language

Tualatin-Yamhill
Northern Kalapuya
Region	Northwest Oregon
Extinct	1937
Language family	Kalapuyan Tualatin-Yamhill
Dialects	Tualatin Yamhill
Language codes
ISO 639-3	nrt
Linguist list	nrt
Glottolog	tual1242

Northern Kalapuyan is a Kalapuyan language indigenous to northwestern Oregon in the United States. It was spoken by Kalapuya groups in the northern Willamette Valley southwest of present-day Portland.

Two distinct dialects of the languages have been identified. The Tualatin dialect (Tfalati, Atfalati) was spoken along the Tualatin River. The Yamhill (Yamell) dialect was spoken along the Yamhill River. The language is closely related to Central Kalapuya, spoken by related groups in the central and southern Willamette Valley.

Northern Kalapuya is now extinct.