Wellington has five sister city relationships:
- Beijing, People's Republic of China
- Sakai, Japan
- Sydney, Australia
- Xiamen, People's Republic of China
- Canberra, Australia
A sister city relationship is a formal, long-term relationship based on diverse linkages between the two cities - including cultural, educational and business links. The relationship requires a high degree of commitment on both sides, as well as the active involvement of a community committee.