For more information on any of the following Interlocal Agreements, please contact Ron Cubellis, Deputy Executive Director, at ron@wcog.org or (360) 685-8382.
| Project/Subject | Agency | Effective Date | Expiration Date |
| Health Care Program | Association of Washington Cities Employee Benefit Trust | 01/01/2014 | None |
| MPO Planning Funding | Whatcom Transportation Authority | 5/28/2015 | 10/19/2025 |
| MPO Planning Process | Washington State Department of Transportation & Whatcom Transportation Authority | 5/28/2015 | 10/19/2025 |
| SCOG Financial Management and Accounting Services | Skagit Council of Governments | 9/15/2021 | 12/31/2024 |
| WCOG Bylaws | 12/12/2018 | None | |
| WCOG Formation Agreement | Various | 12/10/2014 | None |
| Whatcom Smart Trips – WTA | Whatcom Transportation Authority | 1/1/2017 | 03/31/2023 |
| Whatcom Smart Trips – Bellingham | City of Bellingham | 1/1/2021 | 12/31/2022 |