| Region 01 |
010 - Connecticut/Western Massachusetts
014 - Boston Mensa
030 - New Hampshire Mensa
040 - Maine Mensa
050 - Vermont Mensa
071 - Northern New Jersey Mensa
120 - Mensa of Northeastern New York
124 - Mid-Hudson Mensa
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| Region 02 |
080 - Delaware Valley Mensa
170 - Central Pennsylvania Mensa
181 - Lehigh Pocono Mensa
200 - Metropolitan Washington Mensa
210 - Maryland Mensa
224 - Richmond Area Mensa
233 - Tidewater Mensa
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| Region 03 |
140 - Western New York Mensa
144 - Rochester Area Mensa
150 - Western Pennsylvania Mensa
247 - Vandalia Mensa
400 - Kentuckiana Mensa
403 - Blue Grass Mensa
430 - Columbus Area Mensa
434 - Maumee Valley Mensa
440 - Cleveland Area Mensa
442 - East Central Ohio Mensa
452 - Cincinnati Area Mensa
480 - Southeast Michigan Mensa
490 - Western Michigan Mensa
496 - Northern Michigan Mensa
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| Region 04 |
461 - Central Indiana Mensa
463 - Chicago Area Mensa
520 - Iowa-Illinois Mensa
530 - Mensa of Wisconsin
550 - Minnesota Mensa
615 - Heart of Illinois Mensa
627 - Sangamon Valley Mensa
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| Region 05 |
275 - Mensa of Eastern North Carolina
280 - Charlotte - Blue Ridge Mensa
287 - French Broad Mensa
293 - Piedmont Area Mensa
294 - Coastal Carolina Mensa
300 - Mensa In Georgia
350 - Central Alabama Mensa
356 - North Alabama Mensa
370 - Middle Tennessee Mensa
380 - Memphis Mensa
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| Region 06 |
716 - Arkansas Mensa
730 - Central Oklahoma Mensa
750 - North Texas Mensa
760 - Mensa 76
770 - Gulf Coast Mensa
780 - South Texas Mensa
786 - Lone Star Mensa
797 - Permian Basin Mensa
798 - Paso del Norte Mensa
870 - New Mexico Mensa
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| Region 07 |
500 - Central Iowa Mensa
570 - South Dakota Mensa
585 - North Dakota Mensa
640 - Mid-America Mensa
655 - Missouri Ozarks Mensa
670 - Kansas Sunflower Mensa
680 - Nebraska/Western Iowa Mensa
800 - Denver Mensa
803 - Boulder/Front Range Mensa
808 - Plains and Peaks Mensa
811 - High Mountain Mensa
820 - Wyoming Mountain Mensa
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| Region 08 |
940 - San Francisco Regional Mensa
954 - Redwood Empire Mensa
970 - Oregon Mensa
980 - Mensa of Western Washington
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| Region 09 |
850 - Greater Phoenix Mensa
856 - Borderline Mensa
900 - Greater Los Angeles Area Mensa
908 - Harbor Area Mensa
920 - San Diego Mensa
922 - Inland Empire Mensa
926 - Orange County Mensa
962 - Mensa Hawaii
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| Region 10 |
322 - Mensa of Jacksonville
325 - Northwest Florida Mensa
327 - Central Florida Mensa
333 - Broward Mensa
334 - Palm Beach County Mensa
335 - Tampa Bay Mensa
339 - Southwest by South Florida Mensa
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