I made a piktochart with data from the Master Sommelier list of members in the Americas (as of December 2017)
The Court of Master Sommeliers Americas includes members that reside in Canada, France, China, Australia and New Zealand.
The full list of global Master Sommeliers can be found here: http://www.courtofmastersommeliers.org/members/
Master Sommeliers by region!
Click on image to enlarge
United States
Midwest
IL
Alvarado, Serafin
Becker, Jesse
Beteta, Fernando
Bube, James
Fredrickson, Kenneth
Marello, Douglas
Singh, Alpana
Spellman, Joseph
KS
Frost, Doug
Hendricks, Drew
MI
Edwards, Ron
Triffon, Madeline
Tyagi, Claudia
OH
O'Brien, Larry
Northeast
DC
Myers, Andrew
MA
Callahan, Brahm
Meagher, R. Michael
NY
Bates, Christopher P.
Carney, Scott
Cronin, Brian
Dagorn, Roger
Dexheimer, Fred
Engelmann, Michael
Kim, Kyungmoon
LaPratt, Alexander
Lepeltier, Pascaline
Maniec, Laura
Morgan, Kathryn
Nadel, Joshua
Ragan, John
Sagaria, Sabato
Wilson, Dustin
VA
Jones, Robert
Kysela, Fran
Slipp, Jarad
Southeast
FL
Blazon, John
Citriglia, Matthew
DePasquale, Laura
Gomez, Juan
Hemer, Eric
Koziol, Brian
McNamara, Andrew
Miliotes, George
Philip, Virginia
Pickral, Emily
GA
McNeill, Michael
KY
Davis, Brett
Harper, Scott
Southwest
OK
Warren, Randa
TX
Broglie, Devon
Collins, Craig
Goldston, Keith
Keck, David
Mason, Jack
Monosoff, Melissa
Rodil, June
Stout, Guy
Tidwell, James
Werley, Barbara
West
AZ
Tresner, Greg
Williamson, Laura
CA - Central
Barbieri, Paolo
CA - Northern
Alioto, Nunzio
Anselmi, Anthony
Ballance, Gillian
Bath, Robert
Bertao, Randall
Blanchard, Chris
Cauble, Ian
Dame, Frederick
de Chambure, Gilles
Dean, Richard
Echavarrie, Desmond
Entrikin, Eric
Fallis, Catherine
Fineman, Rebecca
Floyd, Sara
Glancy, David
Goldstein, Evan
Granoff, Peter
Ha, Yoon
Harris, Morgan
Heller, Jason
James, Jay
Kelly, Dennis
Kemiji, Emmanuel
Kruth, Geoff
Lucero, Sur
McClintic, Brian
Miller, Christopher
Morehouse, Jeremiah
Morey, Steve
Murray, Alan
Narito, Jr., Reggie
O'Connor, David
Patrick, Aaron
Reilly, Kevin
Roberts, Paul
Robinson, Andrea Immer
Rollston, Jim
Sherer, William
Smith, Robert
Soulière, Pier-Alexis
Stamp, Matthew
Vogt, Kevin
Wiegand, Ronn
Wines, Emily
Yoshida, David
CA - Southern
Jordan, Michael
Neptune, Peter
Osterland, Eddie
Poe, Steven
Williamson, Laura
CO
Belding, Wayne
Betts, Richard
Fletcher, Jay
Krenik, Doug
McCoy Jr., Carlton James
Micu, Roland
Mohr, Sally
Ornowski, Damon
Pullis, Jonathan
Razee, Sean
Stuckey, Bobby
Zimmerman, Brett
HI
Furuya, Chuck
Okubo, Patrick
Viernes, Roberto
NM
Gaiser, Tim
NV
Costello, William
De Santos, Luis
Geddes, Lindsey
Geddes, Steven
Harmon, Ira
Hetzel, Nick
Mumford, Ron
Phillips, Joseph
Sisk, Cameron
Smith, Jason
Tebbe, Brandon
OR
Ready, Nate
Stone, Larry
WA
Bigelow, Robert
Bjornholm, Shayn
Harrington, Greg
Linder, Joseph
Price, Thomas
Rohrbaugh, Jackson
Tanghe, Christopher
Tavernaro, Angelo
International
Canada
ON
Huether, Jennifer
Szabo, John
Wallner, Bruce
QC
Lambert, Elyse
Australia
VIC
Ross, Jonathan
France
Mârgaux
Burke, Thomas
China
Hong Kong
Allyn, Darius
New Zealand
AUK
Douglas, Cameron