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Sister Cities

The Winterthur Museum of Art in Winterthur, Switzerland

Sister Cities

A Partnership That Works!

Ontario Sister Cities:

Brockville, Ontario, Canada - Guamuchil, Sinaloa, Mexico - Los Mochis, Sinaloa, Mexico - Mocorito, Sinaloa, Mexico - Winterthur, Switzerland - Jieyang, China


The Ontario Sister City Committee was founded and organized on July 19, 1975. Ontario's first sister city affiliation occurred on January 18, 1977, when Ontario City Council and the Mayor passed Resolution 8100 officially adopting Brockville, Ontario, Canada, home of the Chaffey Brothers who founded Ontario, California. Since that time, other cities have been chosen because of their similarities to Ontario and their willingness to develop friendships and cultural exchanges. Ontario has formed affiliations with Winterthur, Switzerland; Guamuchil, Los Mochis & Mocorito, Sinaloa, Mexico (1982); and Jieyang, China. Originally formed as a city committee, Ontario Sister Cities became a nonprofit corporation in December 7, 1979, because of its widespread acceptance and grand success.

Ontario Sister Cities Contact Information 

1267 W. Brooks Street
Ontario, California 91762

(909) 395-9150 Phone
(909) 395-9249 Fax

Dorothy Pineda - President
Ricardo Armenta- Vice-President
Michael Higgins - Treasurer
Sharon Luna - Secretary

Mission Statement

Ontario Sister Cities is a nonprofit organization created to foster an exchange of cultural, social and economic information between the City of Ontario and its designated Sister Cities: Brockville, Canada; Winterthur, Switzerland; Guamuchil, Los Mochis & Mocorito, Sinaloa, Mexico; and Jieyang, China. 


  • Providing opportunities for Ontario citizens, city officials and others to explore, enrich cross-cultural experiences
  • Exchanging ideas and developing long term friendships with people of our Sister Cities
  • Creating a friendly atmosphere in which economical and community development can be implemented and strengthened between our Sister Cities
  • Providing networking opportunities with local businesses, service groups and municipality in promoting the mission of O.S.C.
  • Establishing an identity as a member of the global family involved in the constructive process of building world peace


  • Humanitarian assistance
  • Group travel and exchange visits
  • Firemen and teacher/student exchanges
  • Cultural and business visitations
  • Host Sister City visitors

The Sister City program was launched as a national concept at the White House in 1956, when President of the United States, Dwight D. Eisenhower called for massive exchanges between Americans and people of other nations. Originally proposed as the people-to-people program, and as part of the National League of Cities, SCI became independent as a nonprofit organization in 1967. Sister Cities International is the national membership organization for sister city state programs in the United States, and currently represents more than 2,100 communities in 121 countries around the world. Ontario Sister Cities is a member of the SCI network.

Sister Cities International

915 15th Street NW, 4th Floor 
Washington, DC 20005

(202) 347-8650 Phone
(202) 393-6524 Fax
E-mail: [email protected]

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