The Confederated Tribes of the Grand Ronde Community of Oregon (CTGR) is a federally recognized tribe of Indigenous peoples of the Northwest Plateau. They consist of at least 27 Native American tribes with long historical ties to present-day western Oregon between the western boundary of the Oregon Coast and the eastern boundary of the Cascade Range, and the northern boundary of southwestern Washington and the southern boundary of northern California.

Yamhill County is one of the 36 counties in the U.S. state of Oregon. As of the 2020 census, the population was 107,722. The county seat is McMinnville. Yamhill County was named after the Yamhelas, members of the Kalapuya Tribe.