Highland Park has two Sister Cities; Ferrara, Italy, established in 1989, and Puerto Vallarta, Mexico, established in 2001. Highland Park's sister city relationships were forged through cooperation with Sister Cities International, based in Washington D.C., who helped match Highland Park with the two cities. In 2006, Highland Park also formed a friendship cities relationship with Kiryat Gat, Israel.A sister city link develops when an American community of whatever size or character links with a community in another nation. The goal for the cities involved is to learn more about each other and to develop exchanges.

As sister cities, citizens and organizations are involved in the exchanging of ideas, cultures and people. Highland Park, Puerto Vallarta, and Ferrara have participated in several exchanges since the relationships were forged. Several organizations from Highland Park have traveled to both Puerto Vallarta and Ferrara, including a contingent from a tennis organization who played in a tennis tournament, the Highland Park Strings, and student groups from Highland Park High School. Conversely, several contingents have traveled from Puerto Vallarta and Ferrara to Highland Park, including a group of 40 young people from Italy who sang and danced Italian music from the 1950s through the 1980s and a group of artists who participated in the 2005 Port Clinton Art Festival. Plans are currently underway to establish exchanges with Kiryat Gat. A group of school children from Kiryat Gat visited Highland Park in 2006 and were given a tour of the City.

The Sister Cities concept was initiated by President Eisenhower in 1956 to establish greater friendship and understanding between the United States and other nations through direct contact.

Current Membership List
Carol Wolfe, President	1 Year - Board Member
Richard Wolfe, Vice President/Puerto Vallarta	1 Year - Board Member
Luis Vasquez, Vice President/Education	1 Year - Board Member
Daniel Reichler, Vice President/Israel	1 Year - Board Member
Bill Lipsman, Vice President/Treasurer	1 Year - Board Member
James Belmont , Vice President/Ferrara	1 Year - Board Member
Wendy Lipsman, Secretary/Historian	1 Year - Board Member
Christine and Paul Larsen	Indefinite Term
Barb Belmont	Indefinite Term
Gail Guggenheim	Indefinite Term
Jim Rosenbaum	Indefinite Term
Mary Jo Papich	Indefinite Term
Larry Block	Indefinite Term
Linda Muskin	Indefinite Term
Juan Montenegro	Indefinite Term
Daniel and Rhoda Pierce	Indefinite Term
Holly Kerr	Indefinite Term
William Sernesi	Indefinite Term
Linda Mandel	Indefinite Term
Carly Schwartz	Student Representative
David Mitchell	Staff Liaison