Great Lakes Chapter - Michigan, Ohio, Illinois, Indiana, Kentucky, Minnesota, Wisconsin, northeastern South Dakota, eastern North Dakota, Manitoba, Ontario, and Quebec
Great Plains Chapter - Nebraska, Iowa, Kansas, Missouri, southern South Dakota
Mid-Atlantic Chapter - Virginia, West Virginia, Maryland, North Carolina, South Carolina, District of Columbia
Northeast Chapter - Pennsylvania, New York, Vermont, New Hampshire, Connecticut, Massachusetts, Maine, Rhode Island, Delaware, New Jersey, and the Maritime Provinces
Pacific Northwest Chapter - Northern California, Oregon, Washington, British Columbia, western Montana, and western Idaho
Pacific Southwest Chapter - Arizona, Hawaii, Central and Southern California, and Nevada
Rocky Mountain Chapter - Colorado, eastern Idaho, eastern Montana, New Mexico, Wyoming, western North Dakota, northwestern South Dakota, Utah, Alberta, and Saskatchewan.
South Central Chapter - Arkansas, Oklahoma, Texas
Southern Chapter - Florida, Georgia, Alabama, Mississippi, Puerto Rico, Tennessee, Louisiana