The legal basis of the Western Interstate Energy Board is the Western Interstate Nuclear Compact (Compact) (Public Law 91-461). The Energy Board is composed of individuals representing: Compact-member states, non-member states invited to participate by the Energy Board, and international territories designated by the Energy Board as Associate Energy Board members. The Compact also authorizes the federal government to appoint an ex-officio representative to the Energy Board.
| State/Province | Representative | Title/Agency |
| Alberta | Christine Lazaruk | Executive Director, Strategy and Integration, Alberta Energy |
| Arizona | Brian Goretzki | Chief, Bureau of Radiation Control, Arizona Dept of Health Services |
| British Columbia | Les MacLaren | Assistant Deputy Minister, Ministry of Energy, Mines and Petroleum Resources |
| California | Janea Scott | Commissioner, California Energy Commission |
| Colorado | Will Toor | Executive Director, Colorado Energy Office |
| Idaho | John Chatburn | Director, Idaho Governor’s Office of Energy Resources |
| Montana | Dan Lloyd | Section Supervisor, Montana Dept of Environmental Quality |
| Nevada | David Bobzien | Director, Nevada Governor’s Office of Energy |
| New Mexico | Sarah Propst | Cabinet Secretary, NM Energy, Minerals & Natural Resources |
| Oregon | Janine Benner | Director, Oregon Dept of Energy |
| Utah | Dr. Laura Nelson | Director, Utah Governor’s Office of Energy Development |
| Washington | Lauren McCloy | Assistant Director, Washington State Governor’s Office |