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 | Member |
| Alberta | Christine Lazaruk | Executive Director, Strategy and Integration Alberta Energy |
Representative |
| Arizona | Brian Goretzki | Director Arizona Radiation Regulatory Agency |
Representative |
| British Columbia | Les MacLaren | Assistant Deputy Minister, Electricity & Alternative Energy Division, Ministry of Energy and Mines |
Representative |
| California | Robert Weisenmiller | Chairman, California Energy Commission | Representative |
| Janea Scott | Commissioner, California Energy Commission | Alternate | |
| Colorado | Kathleen Staks | Executive Director, Colorado Energy Office | Representative |
| Idaho | John Chatburn | Director, Idaho Governor’s Office of Energy Resources | Representative |
| Montana | Jeff Blend | Economist, Montana Dept of Environmental Quality | Representative |
| Craig Jones | Montana Dept of Environmental Quality | Alternate | |
| Nevada | Angie Dykema | Director, Nevada Governor’s Office of Energy | Second Vice Chair |
| New Mexico | Vacant | Representative | |
| Oregon | Janine Benner | Director, Oregon Dept of Energy | Alternate |
| Saskatchewan | Mike Balfour | Director, Energy Economics Branch, Ministry of the Economy |
Representative |
| Floyd Wist | Energy Policy Division, Ministry of Energy & Resources | Alternate | |
| Utah | Dr. Laura Nelson | Director, Utah Governor’s Office of Energy Development | Chair |
| Washington | Tony Usibelli | Assistant Director, State Energy Office, Washington Dept of Commerce | Treasurer |
| Wyoming | Vacant | Representative | |
| U.S. Government | Vacant | Representative |