Umpqua County was a county located in the U.S. state of Oregon. It was created on January 24, 1851, by the Oregon Territorial Legislature embracing the lands along the Umpqua River in southwestern Oregon. Gold had been discovered in the Umpqua region, which brought a rapid increase of settlers to the new county. The first meeting of the Umpq…Umpqua County was a county located in the U.S. state of Oregon. It was created on January 24, 1851, by the Oregon Territorial Legislature embracing the lands along the Umpqua River in southwestern Oregon. Gold had been discovered in the Umpqua region, which brought a rapid increase of settlers to the new county. The first meeting of the Umpqua County Court was in Elkton in 1852; later the county government was moved to Green Valley and Yoncalla.