The Kalapuya are a Native American ethnic group. They are members of the Confederated Tribes of the Grand Ronde Community of Oregon. The Kalapuya tribes' traditional homelands were the Willamette Valley of present-day western Oregon in the United States, an area bounded by the Cascade Range to the east, the Oregon Coast Range at the west, the Columbia River at the north, to the Calapooya Mountains of the Umpqua River at the south.