2021 Jewel Award Winners
Class I (1100+ members)
- Diamond: Metropolitan Washington Mensa
- Ruby: Chicago Area Mensa
- Sapphire: Mensa in Georgia, North Texas Mensa
- Emerald: Greater Los Angeles Area Mensa, Mensa of Western Washington, San Francisco Regional Mensa
Class II (400-1099 members)
- Diamond: Central New Jersey Mensa
- Ruby: Charlotte Blue Ridge Mensa, Southeast Michigan Mensa
- Sapphire: Cincinnati Area Mensa, Mensa 76, Mid-America Mensa
- Emerald: Central Indiana Mensa, Central Texas Mensa, Connecticut & Western Massachusetts Mensa, Delaware Valley Mensa
Class III (200-399 members)
- Diamond: Dayton Area Mensa
- Ruby: East Central Ohio Mensa, New Hampshire Mensa
- Sapphire: Piedmont Area Mensa, Manasota Mensa, Tidewater Mensa, Nebraska/Western Iowa Mensa
- Emerald: Mensa Hawaii, Plains and Peaks Mensa, Southern Connecticut Mensa
Class IV (125-199 members)
- Diamond: Mensa of Northeastern New York
- Ruby: French Broad Mensa, North Alabama Mensa
- Sapphire: Blue Grass Mensa, Northern Nevada Mensa, Smoky Mountain Mensa
- Emerald: Central Alabama Mensa, Central South Carolina Mensa, New Orleans Mensa, Triad Mensa
Class V (fewer than 125 members)
- Diamond: South Coast Mensa
- Ruby: High Mountain Mensa, Northeast Indiana Mensa
- Sapphire: Mid-Michigan Mensa, Tallahassee Area Mensa, Wyoming Mountain Mensa
- Emerald: Chattanooga Mensa, North Dakota Mensa, South Mississippi Mensa, Sunflower Mensa