YONCALLA SOUTHERN KALAPUYA : Click for SANTIAM or TUALATIN   Yoncalla Territory: Northwest Oregon. Santiam Divisions: Yoncalla, Elk, and Calapooya Creeks.     Portals .   Confederated Tribes of Grand Ronde : part of whose membership is Yoncalla Grand Ronde, Oregon   Confederated Tribes of Siletz : part of whose membership is Yoncalla Siletz, Oregon #26 Yoncalla Population United States (2010) - 450 K A L A P U Y A N