UMPQUA UPPER UMPQUA - UMBIQUA - UMPHOUAH   Umpqua Territory: Southwest Oregon.   Portals .   Cow Creek Band of Umpqua Tribe of Indians Roseberg, Oregon   Confederated Tribes of Grand Ronde : part of whose membership is Umpqua Grand Ronde, Oregon   Confederated Tribes of Siletz : part of whose membership is Umpqua Siletz, Oregon #30 Umpqua Population United States (2010) - 1,200 N A - D E N E