The State of Victoria engages in international diplomacy and economic cooperation through "Sister State" and equivalent formal relationships. These include:
* **Aichi Prefecture, Japan** (Established 1980) * **Jiangsu Province, China** (Established 1979) * **Washington State, United States** (Established 1996) * **Sichuan Province, China** (Established 2016) * **Busan, South Korea** (Established as a cooperative relationship)
*(Note: Many individual municipalities within Victoria, such as the City of Melbourne, hold their own distinct Sister City relationships, including ties to Osaka, Milan, and Boston).*