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Contact Us

If you have any questions or problems, please feel free to contact our office by email at isa@isa-arbor.com or by phone at 888.472.8733. We look forward to the opportunity to help answer your questions.

Mailing Address

International Society of Arboriculture
P.O. Box 3129
Champaign, IL 61826-3129

Physical Address

International Society of Arboriculture
2101 West Park Court
Champaign, IL 61821

Phone and FAX Numbers

Toll Free: 888.472.8733
Phone: 217.355.9411
FAX: 217.355.9516

Hours of business

The ISA office is open from 8a.m. to 5 p.m. Monday through Friday. The headquarters is located in Champaign, Illinois, and is in the Central Time Zone.