OSCA was organized in 1965 by a group of Omaha business leaders and the Mayor's office. OSCA is an all-volunteer, not-for-profit organization, affiliated with Sister Cities International.


Throughout its history, the organization has grown from one sister city to six:

Shizuoka, Japan

Braunschweig, Germany

Siauliai, Lithuania

Naas, Ireland

Xalapa, Mexico

Yantai, China


OSCA is part of Sister Cities International, whose mission is to promote peace through mutual respect, understanding and individual, one community at a time.


We truly are “bringing the world closer together…one community, one individual at a time.” We hope you will join us.

Check our events out and join us!