The Great Lakes Sign Association is a non-profit trade association representing the sign and visual communications industry in the upper Midwest. It focuses on supporting the industry through connections, education, contacts, and events. The GLSA is an independent, regional affiliate of the International Sign Association, which is based in Virginia and hosts the industry-leading ISA International Sign Expo every spring. The GLSA was established on September 10, 2026, following the merger of the Minnesota, Wisconsin and Illinois sign associations, and includes Iowa in its region.

The association serves the upper Midwest, including Illinois, Wisconsin, Iowa and Minnesota. Its regional focus helps it support professionals in those states. Sign companies and sign industry vendors that are based in other states are welcome to join the GLSA.

Yes. Events include regional meet and greets, which are sometimes held at a sign company or vendor's place of business. The largest event of the year is the annual Fall Conference and Sign EXPO, held every September.