Sister Cities International Southern California Chapter, Inc. (SoCal Sister Cities) is a tax-exempt 501(c)(3) organization, established in Southern California.

Promoting Peace Through People-to-People Diplomacy

Building friendship and understanding between Southern California communities and cities around the world — one individual, one community at a time.

Watch: What are Sister Cities?

What Is SoCal Sister Cities?

Sister Cities International Southern California Chapter, Inc. (SoCal Sister Cities) is a tax-exempt 501(c)(3) organization, established as an extension of Sister Cities International (SCI) in Southern California.

SoCal Sister Cities supports sister city programs throughout Southern California, from San Luis Obispo to the U.S.–Mexico border. Our Board of Directors provides information, guidance, and organizational support to communities with established sister city partnerships around the world, as well as those interested in developing new international relationships.

As the Southern California chapter of Sister Cities International (SCI), SoCal Sister Cities serves as a regional resource for information sharing, best practices, international protocol, and collaboration. We are committed to strengthening existing sister city relationships, encouraging new partnerships, and promoting international friendship, cultural understanding, and cooperation among communities worldwide.

State Charity Registration #CT0163170 · EIN# 33-0607663

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Ways We Collaborate

Youth & Education

Arts & Culture

Trade & Government

Sports & Exchanges

Performances & Festivals

Trade Delegations

Student & Teacher Exchanges

Virtual Exchanges

Peace Parks & Gardens

Peer Learning Between Cities

Humanitarian Projects

Disaster Relief & Philanthropy

Friendship That Spans the Globe

Southern California communities are twinned with cities on six continents — bound by culture, exchange, and a shared commitment to peace.

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The Sister Cities Program is an important resource to the negotiations of governments in letting the people themselves give expression of their common desire for friendship, goodwill and cooperation for a better world for all.

President Dwight D. Eisenhower