The purpose of memorandums is to aid in decision making. Washington state governors sign memorandums with other states and countries to communicate a shared interest or policy goal.
- 55th Anniversary of the sister state relationship between Washington and Hyogo Prefecture
- Prosperous cooperation agreement between the state of Washington and Province of Jeollabuk-do of the Republic of Korea
- Letter of Intent between Washington and the Ministry of the Environment
- Memorandum of cooperation between Washington and the Government of Japan on Economic and Trade Relation
- Memorandum of understanding between The Republic of Chile and Washington concerning energy, disaster risk Reduction, ocean acidification and economy
- Memorandum of understanding between Washington and The Government of the Republic of Chile concerning joint interests
- Memorandum of understanding between British Columbia and Washington concerning advancing joint interests
- Memorandum of understanding between the Umbria Region and Washington on cooperation in areas of common interest
- Memorandum on further strengthening sister province/state relationship between Washington and Sichuan Province of the People's Republic on China
- The U.S. and China Governor's accord on clean energy and economic development
- Memorandum of understanding regarding educational, scientific, and cultural cooperation
- Birmingham declaration on zero emission vehicles