Midwest Great Lakes Region

• Chicagoland Chapter
• Kansas City Chapter
• Michigan Chapter
• Nebraska / Western Iowa Chapter
• Ohio Chapter
• St. Louis Chapter
• Also covering the following US States and Canadian Provinces
  • Illinois
  • Indiana
  • Iowa
  • Kansas
  • Minnesota
  • Nebraska
  • North Dakota
  • Ontario
  • Quad Cities
  • South Dakota
  • Wisconsin

Northeast Region

• Chesapeake Bay / Delaware Valley Chapter
• New England Chapter
• New York Chapter
• Also covering the following
  US States and Canadian Provinces
  • Connecticut
  • District of Columbia
  • Maine
  • Maryland
  • Massachusetts
  • New Brunswick
  • Newfoundland and Labrador
  • New Hampshire
  • New Jersey
  • Nova Scotia
  • Pennsylvania
  • Prince Edward Island
  • Quebec
  • Rhode Island
  • Vermont

Pacific Northwest Region

• Alaska Chapter
• Alberta Chapter
• British Columbia Chapter
• Hawaii Chapter
• Oregon / SW Washington Chapter
• Saskatchewan Chapter
• Washington Chapter
• Also covering the following
  US States and Canadian Provinces
  • Idaho
  • Manitoba
  • Montana
  • Northwest Territories
  • Nunavut
  • Yukon

Southeast Region

• Florida Chapter
• Georgia Chapter
• North Carolina Chapter
• South Carolina Chapter
• Tennessee Chapter
• Virginia Chapter
Also covering the following US States
• Alabama
• Kentucky
• Mississippi
• West Virginia
• United States Virgin Islands (USVI)
• Puerto Rico

Southern Region

• Central Texas Chapter
• Gulf Coast Chapter
• Louisiana Chapter
• North Texas Chapter
• Oklahoma Chapter
• South Texas Chapter
Also covering the following US States
• Arkansas

Southwest Region

• Arizona Chapter
• Las Vegas Chapter
• Northern California / Nevada Chapter
• Rocky Mountain Chapter
• Southern California Chapter
• Utah Chapter
• Also covering the following US States
  • New Mexico
  • Wyoming

Australasia Region

• ACT
• New South Wales Chapter
• Queensland Chapter
• South Australian Chapter
• Victoria Chapter
• Western Australian Chapter
• New Zealand Chapter
• Tasmania Chapter
• Affiliate: Northern Territory
• Also covering the following countries
  • American Samoa
  • Australia
  • Brunei
  • Cambodia
  • Christmas Island
  • Cocos (Keeling) Island
  • Cook Island
  • Fiji
  • French Polynesia
  • Indonesia
  • Kiribati
  • Laos
  • Malaysia
  • Micronesia (Federated States of)
  • Myanmar
  • Nauru
  • New Caledonia
  • Niue
  • Norfolk Island
  • Palau
  • Papua New Guinea
  • Philippines
  • Pitcairn island
  • Samoa
  • Singapore
  • Solomon Island
  • Thailand
  • Timor-Leste
  • Tokelau
  • Tonga
  • Tuvalu
  • Vanuatu
  • Vietnam
  • Wallis and Futuna

All Other Nations

• At-Large