Below, you'll find an index of maps of the Oregon Territory and, after 1859, when Oregon achieved statehood, the State of Oregon. The maps show the counties and their boundaries from 1843 to the present day. Maps courtesy of the Oregon Historic Society.

Clicking on the name of any map will take you to that map.

Historic County Maps Map Page 1 - The Oregon Territory - 1843 - A Map of the Oregon territory as delineated in 1843 Map Page 2 - The Oregon Counties - 1845 - A Map of the Oregon territory and county boundaries as delineated in 1845 Map Page 3 - The Oregon Counties - 1847 - A Map of the Oregon territory and county boundaries as delineated in 1847 Map Page 4 - The Oregon Counties - 1851 - A Map of the Oregon territory and county boundaries as delineated in 1851 Map Page 5 - The Oregon Counties - 1853 - A Map of the State of Oregon and county boundaries as delineated in 1853 Map Page 6 - The Oregon Counties - 1856 - A Map of the State of Oregon and county boundaries as delineated in 1856 Map Page 7 - The Oregon Counties - 1862 - A Map of the State of Oregon and county boundaries as delineated in 1862 Map Page 8 - The Oregon Counties - 1865 - A Map of the State of Oregon and county boundaries as delineated in 1865 Map Page 9 - The Oregon Counties - 1874 - A Map of the State of Oregon and county boundaries as delineated in 1874 Map Page 10 - The Oregon Counties - 1893 - A Map of the State of Oregon and county boundaries as delineated in 1893 Map Page 10 - The Oregon Counties - 1941 - A Map of the State of Oregon and county boundaries as delineated in 1941 Please Note: Grateful acknowledgement is made to the Oregon Historical Society for making these maps and to Glenn Harrison, of the Linn County Historical Society who made them available for inclusion in our site.