Nearly every state has an association that represents forestry practiced by both the forest owner and forestry trade organizations. These forestry associations are designed to protect timber growers and timber processors from excessive regulation, provide them with continuing education in the effort to grow and harvest trees and recognize excellent forest stewardship. Find your forestry association here!
Also, I like to keep this list current. Please let me know of one that I may have missed. Note that I try to index state forestry associations by state or Canadian Provence name and that I also have another index for species and product specific associations that go beyond state boundaries.