As of December 13, 2024, Zhongshan has established friendly relations with 22 cities in 14 countries, including 6 international sister cities and 16 international friendly cooperation and exchange cities. The Zhongshan People's Association for Friendship with Foreign Countries has successively established relations with 17 foreign friendly organizations and institutions, and established a friendly exchange mechanism with its counterpart units in more than 20 countries and regions in the fields of education, sports, culture, health care, economy and trade, tourism, talent, science and technology, municipal construction, etc. Sanxiang Town, Xiaolan Town and Nanlang Sub-district have established friendly cooperation relations with foreign cities.

1. Sister Cities (6)

Moriguchi, Japan (1988); Honolulu, the United States (1997); Burnaby, Canada (2011); Markham, Canada (2014); Rull, the Federated States of Micronesia (2017); Chillan, Chile (2024).

2. Friendly Cooperation and Exchange Cities (16)

Alameda County, the United States; Cairns, Australia; Culiacan, Mexico; Puntarenas, Costa Rica; Nagasaki, Japan; George Town, Malaysia; Cleveland, the United States; Kołobrzeg, Poland; Seo-gu, Incheon, South Korea; Millbrae, the United States; Montgomery County, the United States; Bad Vilbel, Germany; Sokehs, the Federated States of Micronesia; Oakland, the United States; Long Thanh, Vietnam; and Ambato, Ecuador.