Sister CityWinterhuir, Switzerland47.5000008.750000
Sister CityBrockville, Canada44.583333-75.683333
Sister CityGuamuchil, Mexico25.463889-108.079444
Sister CityMocorito, Mexico24.978056-107.523611

Interactive City Directory

Ontario, California
34.063344 -117.650888

Population: 163,924


Contact Name: Dorothy Pineda

Contact Email:

Contact Phone: 909-395-9150

Take Action

This year marks a pivotal moment during which Sister Cities International is celebrating 60 years of peace through people. Get involved in this momentous year.
More Information


As the world becomes smaller, and connections online become more frequent than face-to-face interactions, multicultural understanding at the community level is more important than ever. Sister Cities International enables citizen diplomats in communities across the world to develop relationships with communities in other countries that are based on cultural understanding and mutual cooperation.Donate