Longmont Sister Cities: Making a World of Difference
Based in Longmont, Colorado, the Longmont Sister Cities Association develops and fosters relationships between people of many cultures. Our first sister city association with Chino, Japan, began in 1991, followed by Ciudad Guzman, Mexico, in 1998. We are also in the process of forming a new sister cities relationship with the Northern Arapaho of the Wind River Reservation in Wyoming.

​Each summer, Longmont hosts a student exchange with our sister cities.
​Throughout the year, we work in our community to host fundraisers for student travel and participate in activities that promote cultural awareness and understanding. 

Longmont - Northern Arapaho Signing Ceremony

LSCA and the City of Longmont are proud to announce the Longmont - Northern Arapaho Signing Ceremony will take place on September 18, 2021 at 3 p.m. at the Longmont Cultural Center. This historic event will create Longmont's third sister city and the first between a Sovereign Tribal Nation and a City. This event will be open to the public and free tickets will be released soon. Please join us for the celebration!


​Become a student ambassador

Experience the adventure of a lifetime as a Student Ambassador to Japan or Mexico through Longmont Sister Cities. To be eligible, you must be enrolled in 8th - 11th grade in a public, private or charter school within the St. Vrain Valley School District.


​Become a chaperone

Chaperones for the LSCA student exchange program have the opportunity to travel to one of our sister cities in Japan, Mexico or the Wind River Reservation with a small group of the finest youth in the St. Vrain Valley School area.

Get Involved
Volunteers and supporters are critical to the success of our non-profit organization.
From hosting a student or volunteering at an event to becoming a donor,
​there are many ways to make a difference! 
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Longmont Sister Cities Association
P.O. Box 2216
Longmont, CO 80502-2216  U.S.A.
Current Applications:


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