Oregon Geographic Names is an authoritative compilation of the origin and meaning of place names in the state of Oregon. As of 2003, the book is in its seventh edition (ISBN 087595278X) and is compiled and edited by Lewis L. McArthur, who took over from his father as of the fourth edition, published in 1974. It is published by the Oregon Historical Society Press.
The seventh edition contains 6252 entries, with references to another 2679 names scattered throughout the text.
In its introduction, it identifies six periods in the history of the state which have contributed to the establishment of names there:
the period of Spanish, British, French and early American exploration, with arrivals by sea and overland, exemplified by the activities of the Hudson's Bay Company and the Lewis and Clark Expedition;
the pioneer period, up to and particularly including the days of the Oregon Trail;
Oregon is also one of four major world hazelnut growing regions, and produces 95% of the domestic hazelnuts in the United States.
Oregon City was the first incorporated city west of the Rockies and later, the first capital of the Oregon Territory, from 1848 to 1852, when the territory capital was moved to Salem, Oregon.
Oregon claims the D River is the shortest river in the world, while the American state of Montana makes the same claim of the Roe River.