Joining the Sister Cities International network is a commitment to promoting peace, respect and mutual understanding across borders. Sister city relationships enable communities to realize and strengthen cultural and historical bonds, increase youth education opportunities, develop diverse economies, and collaboratively tackle emerging issues. Our relationships foster thriving, globally competitive communities.

If your community is interested in becoming part of a network of nearly 500 member communities, 1800 partnerships, and tens of thousands of citizen diplomats, please fill out the appropriate application below.

Click here to learn more about the Benefits of Membership

Click here to learn more about Introducing Sister Cities to your Community

Click here for a Quick Guide to Establishing a Sister City

U.S. Member Application

Community PopulationAnnual Cost 
Under 5,000$190Apply Now
5,000‐10,000$310Apply Now
10,000‐25,000$440Apply Now
25,000‐50,000$610Apply Now
50,000‐100,000$810Apply Now
100,000‐300,000$1,030Apply Now
300,000‐500,000$1,380Apply Now
500,000‐1,000,000$1,910Apply Now
1,000,000 and above$2,280Apply Now

Global Member Application

Community PopulationAnnual Cost 
Under 100,000$750Apply Now
100,000‐500,000$1,750Apply Now
Above 500,000$2,500Apply Now



Sister Cities International knows how to create and foster environments where relationships take seed and grow, in what’s maybe the most fertile soil of oil: curiousity about discovering the familiar in the unfamiliar.

-Masashi Oka, Executive Chairman, MUFG Americas Holdings