High IQ Society for Humanity High IQ society with the objective to help the care children
Sigma Society VI 99.9999999th percentile (+6sd)
Sigma Society V 99.99997th percentile (+5sd)
Pars Society 99.99997th percentile
OLYMPIQ Society 99.99997th percentile
Pi Society 99.9999th percentile
Mega Society (East Coast) 99.9999th percentile
Mega Society (West Coast) 99.9999th percentile
Mega HIQ Girls 99.9999th percentile among women
Platinum Society 99.9971th percentile (+4.0202sd)
Sigma Society IV 99.997th percentile (+4sd)
HELLIQ Society 99.997th percentile
Ultranet 99.997th percentile
Prometheus Society 99.997th percentile
Ludomind Society 99.99th percentile (IQ>150 and author of difficult, beautiful and original puzzles)
Veritas Society 99.99th percentile
Minzar - The High IQ Society for Christians 99.9537th percentile
ISI-S 99.916th percentile
CIVIQ Society 99.9th percentile
International Society for Philosophical Enquiry 99.9th percentile
Triple Nine Society 99.9th percentile
One in A Thousand Society 99.9th percentile
Glia Society 99.9th percentile; Also, GliaWeb
IQuadrivium Society 99.9th percentile
SesquIQ 99.9th percentile
Sigma Society III 99.87th percentile (+3sd)
Cerebrals.com 99.7th percentile
Colloquy 99.5th percentile, email society
Poetic Genius Society 99.5th percentile
Existentia 99th percentile
Top One Percent Society 99th percentile
Intertel 99th percentile
High Potentials Society 98th percentile
Smart Society 98th percentile
Mensa (USA site) 98th percentile
Mysterium 98th percentile
The Commune - A High IQ Society For Leftists 98th percentile
Sigma Society, older site 97.7th percentile (+2sd)
Vinci Society 95.05th percentile
International High IQ Society 95th percentile
High IQ Society for the Disabled 95th percentile
Golden Dawn High IQ Society 95th percentile
Red Dot Society (member of any high IQ society is accepted)
Thinkers International email discussion group (Hi-IQ membership not required)
High IQ email society (Hi-IQ membership not required)