Alabama

• Central Alabama Koi & Water Garden Society
• Gulf Coast Koi Society 

Arizona

• Southern Arizona Koi Association (Tucson) 
• Tucson Koi Society
• Valley of the Sun Koi Club (Phoenix) - Website 

California

• Bakersfield Koi & Water Garden Society
• Camellia Koi Club (Sacramento) - Website
• Central California Koi Society (Fresno) - Website
• High Desert Koi Fanciers (Palmdale)
• Ikiru Hoseki Koi Club (San Gabriel & San Fernando Valleys) 
• Koi Club of San Diego - Website
• Koi Kichi & Water Garden Club (Lakewood) 
• Mendocino Coast Koi & Water Garden Society
• Nishiki Koi Club (Orange County)  - Website
• San Francisco Bay Area Koi Club - Lucia Rose
• Shasta Koi & Water Garden Club (Redding)
• Southern California Koi Club (LA & Orange County)
• Ventura County Koi Society - Website
• Zen Nippon Airinkai Koi Club
• Zen Nippon Airinkai Southern California Chapter

Colorado

• Rocky Mountain Koi Club (Denver) - Website

Florida

• First Coast Koi, Goldfish & Water Garden Club (Jacksonville) 
• Florida East Coast Koi & Water Garden Society (Daytona Beach) - Website
• Florida West Coast Koi & Water Garden Club
• Gainesville Koi, Goldfish & Watergarden Club - Website
• Nature's Coast Koi & Water Garden Club (Old Town)
• North Florida Koi Club (Jacksonville) - Website
• Orlando Area Koi & Pond Club - Website
• Southern Koi Association
• Tampa Bay Koi & Water Garden Club
• Tropical Koi Club of South Florida (Boca Raton) - Website

Georgia

• Atlanta Koi Club - Website
• Middle Georgia Koi Society

Hawaii

• Hawaii Goldfish & Koi Association

Idaho

• Idaho Water Garden & Koi Society - Website

Illinois

• Central Illinois Water Gardeners 
• Midwest Pond & Koi Society - Bryan Bateman - Website
• Northern Midwest ZNA Chapter - Website
• Placid Pond & Koi Association 
• Prairieland Koi & Pond Society - Website

Indiana

• Indiana Koi & Water Garden Club

Iowa

• Eastern Iowa Pond Society

Kansas

• Koi Club of Kansas

Kentucky

• Greater Louisville Koi & Goldfish Society - Website

Massachusetts

• Pioneer Valley Water Garden & Koi Club - Website 

Michigan

• Capital Area Koi & Water Gardening Club (Lansing) - Website
• Great Ponds & Koi Society of West Michigan
• Michigan Koi & Pond Clubs - Southeast Chapter - Website
• Mid-Michigan Pond & Water Garden Club

Missouri

• St. Louis Water Gardening Society - Website
• Springfield Watergarden Society
• West Plains Watergarden Society

Nevada

• Cyprinus Society of Nevada
• Las Vegas Koi Club 
• Northern Nevada Pond Club
• Sierra Koi Club

New York

• Genesse Valley Pond & Koi Club
• Koi & Water Garden Society of Central New York
• Niagara Frontier Koi & Pond Club - Website

North Carolina

• North Carolina Koi & Watergarden Society
• Piedmont Koi & Watergarden Society (Charlotte)

Ohio

• Dayton Koi & Goldfish Club
• Miami Valley Water Garden Society - Website
• Ohio Koi Club (Columbus)

Oklahoma

• Cherokee Strip Water Garden Society
• Oklahoma Koi Society (Oklahoma City)
• Tulsa Koi Society

Oregon

• Cascade Koi & Goldfish Club (Portland)
• Northwest Koi & Goldfish Club (Portland/Vancouver) - Website
• Oregon Koi & Watergarden Society - Website
• Pacific Wonderland Koi Club

Penn Virginia Maryland

• Mid-Atlantic Koi Club (NY, NJ, PA, DE, MD, DC, VA, WV) - Website
• ZNA Potomac Chapter Koi Club (DC, MD, PA, VA) - Website

South Carolina

• Charleston Showa Koi Club - Website
• South Carolina Koi and Water Garden Society (Upstate) - Website  

Tennessee

• Nashville Pond Society
• The Great Smoky Mountains Koi Club 
• The Koi Club of Middle Tennessee 
• West Tennessee Pond Society (Jackson)

Texas

• Amarillo Koi Society
• Austin Koi & Goldfish Club
• Austin Pond Society - Website
• Dallas Koi Kichi Group - Website
• Koi & Water Garden Club of North Texas - Website
• Las Pampas Koi & Water Garden Society
• Lone Star ZNA Koi Club (Houston) - Website
• Moto-Kara Koi Kai (Houston/Galveston)
• North Texas Water Garden Society - Website
• Southwest Koi & Pond Association (El Paso)
• Texas Koi & Fancy Goldfish Society (San Antonio)
• Water Garden Club of South Texas

Washington

• Inland Empire Water Garden & Koi Society (Spokane)
• Mid Columbia Koi & Pond Club (Tri-Cities) - Website
• Olympic Koi, Goldfish & Water Garden Club
• Puget Sound Koi Club
• Washington Koi & Water Garden Society (Seattle) - Website

West Virginia

• Mountaineer Koi & Water Garden Society

Wisconsin

• Madison Area Pond Society