In 2000, Oregon had 17 library systems; the total book stock of all public libraries was 8,895,249, and their combined circulation was 34,814,000. Most cities and counties in Oregon have public library systems, the largest being the Multnomah County library system in Portland, with 14 branches and 1,288,634 volumes in 1999. The State Library in Salem serves as a reference agency for state government. Total public library income in 2000 was $109 million, including $759,878 in federal grants and $651,324 in state grants. Per capita spending was $30.00.
Oregon has 105 museums, historic sites, botanical gardens and arboretums. Historical museums emphasizing Oregon's pioneer heritage appear throughout the state, with Ft. Clatsop National Memorial—featuring a replica of Lewis and Clark's winter headquarters—among the notable attractions. The Oregon Historical Society operates a major historical museum in Portland, publishes books of historical interest, and issues the Oregon Historical Quarterly. In Portland's Washington Park area are the Oregon Museum of Science and Industry, Washington Park Zoo, Western Forestry Center, and an arboretum and other gardens.