The Library of Congress Classification system defines Pacific Northwest for maps (G1464.3-.32) as: Pacific Northwest - The old Oregon Country, comprising the present states of Oregon, Washington, and Idaho, parts of Montana and Wyoming, and the province of British Columbia The US local History number F851.7 has: The Pacific Northwest - Including Washington, Oregon, Idaho, Montana, British Columbia Hope this is helpful. Colleen Colleen R. Cahill Digital Conversion Coordinator and Recommending Officer for Fantasy and Science Fiction Geography & Map Division Library of Congress 101 Independence Ave. SE Washington, DC 20540-4650 Voice: 202-707-8540 Fax: 202-707-8531 [log in to unmask]<mailto:[log in to unmask]> From: Maps-L: Map Librarians, etc. <[log in to unmask]> On Behalf Of Aimee Quinn Sent: Monday, April 09, 2018 2:37 PM To: [log in to unmask] Subject: states which compose the Pacific Northwest Hello folks, I've been asked to come up with collection scope including a specified geographic limit for our map collection perhaps just to the Pacific Northwest, however, the U.S. government does not appear to have a consistently defined geographic area for the Pacific Northwest. So I thought I would turn to my colleagues to see how you define this region of the United States. Below are a sample of different geographic definitions currently in place by the federal government. Census Bureau Division 9: Pacific Alaska, California, Hawaii, Oregon, Washington https://www2.census.gov/geo/docs/maps-data/maps/reg_div.txt Bureau of Reclamation Columbia River Basin in Idaho, Oregon, Washington, Montana, Wyoming https://www.usbr.gov/pn/index.html USDA, Forest Service Pacific Northwest Region States of Oregon and Washington, Including Portions of Del Norte and Siskiyou Counties in California, and Portions of Nez Perce, Salmon, Idaho, and Adams Counties in Idaho https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprd3812803.pdf USA.gov Oregon & Washington https://gacc.nifc.gov/nwcc/ USGS Idaho, Montana, Oregon, Washington, and Wyoming https://www.usgs.gov/science/regions/northwest?qt-regions_l2_landing_page_tabs=0#qt-regions_l2_landing_page_tabs Your advice is greatly appreciated with many thanks, Aimée Aimée C. Quinn Assistant Professor | Government Publications Librarian James E. Brooks Library, Depository 0649-A Central Washington University 400 E. University Way Ellensburg, WA 98926 509-963-1592 [log in to unmask]<mailto:[log in to unmask]> "Life should be lived so vividly and so intensely that thoughts of another life, or of a longer life, are not necessary.<https://www.inspiringquotes.us/quotes/M0Ap_u9salViA>" -- Marjory Stoneman Douglas