Kalapuyan (also Kalapuya) is a small extinct language family that was spoken in the Willamette Valley of Western Oregon, United States.

Kalapuyan descendants in the southernmost Kalapuya region of Yoncalla, Oregon, published 100 copies of a comprehensive dictionary, with plans to expand.

This was originally part of an Oregon Penutian branch along with Takelma, Siuslaw, Alsea and Coosan.

[4] A special relationship with Takelma had been proposed, together forming a "Takelma–Kalapuyan" or "Takelman" family.

[5][6][7][8] However, an unpublished paper by Tarpent & Kendall (1998)[9] finds this relationship to be unfounded because of the extremely different morphological structures of Takelma and Kalapuyan.