A letter from the President
At our core, Sister Cities International recognizes, celebrates, and magnifies the catalytic power of people-to-people interaction through mutual respect, understanding, and cooperation—one individual, one community at a time. I look forward to guiding our collective action in 2018 and beyond.

-SCI President & CEO Roger-Mark De Souza

Read the Full Letter from Our President

Support our Mission to Promote Peace Through People

Connect Globally. Thrive Locally.

Since 1956, Sister Cities International has worked to create exchanges that create community impact and kindle lifelong friendships.

Sister Cities International was created at President Eisenhower’s 1956 White House conference on citizen diplomacy.  Eisenhower envisioned an organization that could be the hub of peace and prosperity by creating bonds between people from different cities around the world.  By forming these relationships, President Eisenhower reasoned that people of different cultures could celebrate and appreciate their differences and build partnerships that would lessen the chance of new conflicts.

Learn More about Our Mission

Our Reach

  • Members - 500
  • Partnerships - 2000+
  • Countries - 140+
Our network of thousands of citizen diplomats and volunteers run sister city programs that promote peace and strengthen local communities. But what is a sister city and why are they important?…Read More