State and Canadian Provincial websites

United States maple producer associations

Maine Maple Producers Association
Massachusetts Maple Producers Association
New Hampshire Maple Producers Association
Minnesota Maple Syrup Producers Association
Vermont Maple Sugar Makers Association
New York State Maple Association
Northwest Pennsylvania Maple Association
Northeastern New York Maple Producers Association
Lewis County New York Maple Producers Association
Ohio Maple Producers Association
Michigan Maple Syrup Association
Indiana Maple Syrup Association
Wisconsin Maple Syrup Producers Association
Western New York Maple Producers Association
Chautauqua (NY) Region Maple Producers Association
Upper Hudson (New York) Maple Producers Association
The Potter - Tioga (PA) Maple Producers Association

Canadian maple producer associations

New Brunswick Maple Syrup Producers Association
Ontario Maple Syrup Producers Association 
Lanark and District Maple Syrup Producers' Association
Maple Syrup Producers of Nova Scotia
Citadelle Maple Syrup Producer's Coop of Quebec