| Audiology and Speech Language Pathology Interstate Compact | 2023 |
| Compact for Education | 2001 |
| Compact on Mental Health | 1971 |
| Counseling Compact | 2023 |
| Driver License Compact | 1963 |
| Emergency Management Assistance Compact | 1999 |
| Interstate Agreement on Detainers | 1963 |
| Interstate Agreement on Qualifications of Educational Personnel | 1977 |
| Interstate Compact for Adult Offender Supervision | 2001 |
| Interstate Compact for Juveniles | 1967 |
| Interstate Compact for the Placement of Children | 2009 |
| Interstate Compact on Adoption and Medical Assistance | 1991 |
| Interstate Compact on Educational Opportunity for Military Children | 2013 |
| Interstate Compact on the Placement of Children | 1975 |
| Interstate Compact to Conserve Oil and Gas | 1945 |
| Interstate Corrections Compact | 1987 |
| Interstate Insurance Product Regulation Compact | 2013 |
| Interstate Library Compact | 1967 |
| Interstate Medical Licensure Compact | 2015 |
| Interstate Mutual Aid Compact | 1985 |
| Multistate Highway Transportation Agreement | 1981 |
| Multistate Lottery Agreement | 1989 |
| Multistate Tax Compact | 1969 |
| National Crime Prevention and Privacy Compact | 1999 |
| Northwest Interstate Compact on Low-Level Radioactive Waste Management | 1983 |
| Northwest Power and Conservation Council | 1981 |
| Northwest Wildland Fire Protection Agreement | 1998 |
| Nurse Licensure Compact | 2015 |
| Occupational Therapy Licensure Compact | 2023 |
| Pacific Northwest Economic Region | 1991 |
| Physical Therapy Licensure Compact | 2017 |
| State Authorization Reciprocity Agreement | 2014 |
| Uniform Unclaimed Property Act | 1963 |
| Western Interstate Corrections Compact | 1967 |
| Western Interstate Nuclear Compact | 1973 |
| Western Regional Education Compact | 1951 |
| Wildlife Violator Compact | 1995 |
| Yellowstone River Compact | 1951 |