| Boating Offense Compact | 1991 |
| Columbia River Compact | 1915 |
| Columbia River Gorge Compact | 1987 |
| Compact on Mental Health | 1957 |
| Driver License Compact | 1983 |
| Emergency Management Assistance Compact | 2002 |
| Goose Lake Basin Compact | 1963 |
| Interstate Agreement on Detainers | 1969 |
| Interstate Agreement on Qualifications of Educational Personnel | |
| Interstate Compact for Adult Offender Supervision | 2001 |
| Interstate Compact for Juveniles | 1959 |
| Interstate Compact on Adoption and Medical Assistance | 1999 |
| Interstate Compact on Educational Opportunity for Military Children | 2014 |
| Interstate Compact on the Placement of Children | 1975 |
| Interstate Corrections Compact | 1979 |
| Interstate Forest Fire Suppression Compact | 1991 |
| Interstate Insurance Product Regulation Compact | 2011 |
| Interstate Library Compact | 1967 |
| Interstate Teacher Mobility Compact | 2023 |
| Klamath River Compact | 1957 |
| Multistate Highway Transportation Agreement | 1983 |
| Multistate Lottery Agreement | 1988 |
| Multistate Tax Compact | 2013 |
| National Crime Prevention and Privacy Compact | 2006 |
| National Popular Vote Interstate Compact | 2019 |
| Northwest Interstate Compact on Low-Level Radioactive Waste Management | 1981 |
| Northwest Power and Conservation Council | 1981 |
| Northwest Wildland Fire Protection Agreement | 1998 |
| Oregon-Washington Columbia River Boundary Compact | 1957 |
| Pacific Northwest Economic Region | 1991 |
| Pacific Northwest Emergency Management Arrangement | 1996 |
| Pacific States Marine Fisheries Compact | 1947 |
| Physical Therapy Licensure Compact | 2016 |
| State Authorization Reciprocity Agreement | 2014 |
| Uniform Unclaimed Property Act | 1957 |
| Western Interstate Corrections Compact | 1959 |
| Western Interstate Nuclear Compact | |
| Western Regional Education Compact | 1953 |
| Wildlife Violator Compact | 1989 |