2018 Jewel Award Winners
Class I (900+ members)
- Diamond: Chicago Area Mensa
- Emerald: Gulf Coast Mensa, Mensa In Georgia, North Texas Mensa, San Francisco Regional Mensa, Southeast Michigan Mensa, Metropolitan Washington Mensa
Class II (400 to 899 members)
- Diamond: Charlotte/Blue Ridge Mensa
- Sapphire: Mid-America Mensa, Connecticut/Western Massachusetts, Denver Mensa, Mensa of Wisconsin, San Diego Mensa, Orange County Mensa, Central Indiana Mensa, Central New Jersey Mensa
- Emerald: Broward Mensa, Maryland Mensa, Cincinnati Area Mensa, Western Pennsylvania Mensa, Lonestar Mensa, Oregon Mensa, Mensa 76, South Texas Mensa, Sacramento Regional Mensa, Cleveland Area Mensa, St Louis Area Mensa, Central Pennsylvania Mensa
Class III (200 to 399 members)
- Diamond: East Central Ohio Mensa
- Sapphire: Piedmont Area Mensa, Nebraska-Western Iowa Mensa, New Hampshire, Tidewater Mensa
- Emerald: Mensa of Northeastern New York Dayton Area Mensa, Manasota Mensa, Tucson Mensa, Mensa of Jacksonville, Channel Islands Mensa, Northern Nevada Mensa, New Orleans Mensa, Kentuckiana Mensa, Mensa Hawaii, Rhode Island Mensa, Southern Connecticut Mensa, Lehigh Pocono Mensa, Middle Tennessee Mensa, Western New York Mensa, Central Oklahoma Mensa
Class IV (100 to 199 members)
- Diamond: French Broad Mensa
- Ruby: Plains and Peaks Mensa, Central South Carolina Mensa, North Alabama Mensa
- Sapphire: Redwood Empire Mensa, Northwest Florida Mensa, Triad Mensa, Delaware Mensa, Central Iowa Mensa, Central Alabama Mensa, Kansas Sunflower Mensa
- Emerald: Mensa Alaska, Savannah Area Mensa of Georgia, Iowa-Illinois Mensa, Northeast Indiana Mensa, Eastern Oklahoma Mensa
Class V (fewer than 100 members)
- Diamond: Sangamon Valley Mensa
- Ruby: High Mountain Mensa, Monterey County Mensa
- Sapphire: Paso del Norte Mensa, Vermont Mensa
- Emerald: Northern Michigan Mensa, North Dakota Mensa, Wyoming Mountain Mensa, South Dakota Mensa, Northern Louisiana Mensa