| Audiology and Speech Language Pathology Interstate Compact | 2022 |
| Bear River Compact | 1955 |
| Compact for Education | 1966 |
| Compact on Adoption and Medical Assistance | 1994 |
| Compact on Mental Health | 1961 |
| Driver License Compact | 1963 |
| Emergency Management Assistance Compact | 2000 |
| Emergency Medical Services Personnel Licensure Compact | 2016 |
| Interstate Agreement on Detainers | 1971 |
| Interstate Agreement on Qualifications of Educational Personnel | 1969 |
| Interstate Compact for Adult Offender Supervision | 2000 |
| Interstate Compact for Juveniles | 1961 |
| Interstate Compact on Adoption and Medical Assistance | 1994 |
| Interstate Compact on Educational Opportunity for Military Children | 2013 |
| Interstate Compact on the Placement of Children | 1976 |
| Interstate Corrections Compact | 1959 |
| Interstate Forest Fire Suppression Compact | 1993 |
| Interstate Insurance Product Regulation Compact | 2010 |
| Interstate Library Compact | 1965 |
| Interstate Medical Licensure Compact | 2015 |
| Interstate Mutual Aid Compact | 1986 |
| Multistate Highway Transportation Agreement | 1975 |
| Multistate Lottery Agreement | 1990 |
| Multistate Tax Compact | |
| National Crime Prevention and Privacy Compact | 2005 |
| Nonresident Violator Compact | 1992 |
| Northwest Interstate Compact on Low-Level Radioactive Waste Management | 1981 |
| Northwest Power and Conservation Council | 1981 |
| Northwest Wildland Fire Protection Agreement | 1998 |
| Nurse Licensure Compact | 2018 |
| Pacific Northwest Economic Region | 1991 |
| Pacific Northwest Emergency Management Arrangement | |
| Pacific States Marine Fisheries Compact | 1976 |
| Psychology Interjurisdictional Compact | 2022 |
| Snake River Compact | 1950 |
| State Authorization Reciprocity Agreement | 2014 |
| Uniform Unclaimed Property Act | 1974 |
| Western Interstate Nuclear Compact | 1969 |
| Western Regional Education Compact | 1953 |
| Wildlife Violator Compact | 1990 |