Here are the top 200 Meetup Groups according to Meetup.com

Name City Country Focus Members Contact Name
The SF JavaScript Meetup San FranciscoUSJS Hackers 13101Dave Nugent
Women Who Code NYC New YorkUSBadass Female Coders 12085Women Who Code
London JavaScript Community LondonGBJSLovers 7837luca mezzalira
Pune Developer's Community PuneINPDC 7228Suyog
Uber Engineering Events - San Francisco San FranciscoUSEngineering Enthusiasts 7112Uber Engineering
ExpertTalks Pune PuneINTech Enthusiasts 7062Ashish
Toronto JavaScript TorontoCAMembers 6863Paul Dowman
ReactJS San Francisco Bay Area meetup San FranciscoUSDevelopers 6704devon lindsey
Founders & Coders LondonGBcollaborators 6615Dan Sofer
JavaScript Israel Tel Aviv-YafoILJavaScripters 6326Shai Reznik
NY JavaScript New YorkUSJavaScripters 6202Jovena Whatmoor
Build with Code - New York City New YorkUSEngineers 5996Jenny Mith
NYC Nodejs New YorkUSNodesters 5974Peter Bell
Hack Reactor: Learn to Code San FranciscoUSEngineers 5941Tyler Lambe
Ironhack Madrid MadridESIronhackers 5721Pablo Onieva
Women Who Code Silicon Valley SunnyvaleUSCoders 5324Women Who Code
Paris.js ParisFRJavaScripteurs 4933Pierrick Paul
Node.js Paris ParisFRNodeurs 4854Etienne Folio
JavaScript Meetup BangaloreINJS Hackers 4848Ganesh Samarthyam
SingaporeJS SingaporeSGdevelopers 4503Tim Oxley
San Diego JavaScript Community San DiegoUSJavaScripters 4449Todd Bashor
Coderplex Community HyderabadINCoders 4214Kapil Dutta
Devhub Toronto TorontoCADevelopers 4187Emma Cuddy
JavaScript São Paulo São PauloBRJavascript developers 4165Erick Wendel
MedellínJS MedellínCOJavaScripters 4145Julián Duque
WarsawJS WarsawPLMembers 4085Piotr Zientara
Node.js Club SF San FranciscoUSMembers 4082Matt Pardee
js-montreal - montreal's javascript user group MontréalCAJavascripters 3936Bruno Carriere
Real World React San FranciscoUSDevelopers 3911Benjamin Dunphy
Node Sydney SydneyAUnoders 3842James Richardson
SFNode San FranciscoUSNode Users 3817Dan Shaw
Modern Web Mountain ViewUSMembers 3815Tracy
Eventloop México CityMXDesarrolladores 3768Jeduan Cornejo
sthlm.js StockholmSEJavaScripters 3660Jonny Strömberg
Javascript Hyderabad HyderabadINjS'ers 3594Harish
Angular Paris ParisFRAngularians 3591Patrick Aljord
AngularSP São PauloBRsuperheroes 3583William Grasel
Women Who Code Berlin BerlinDEMembers 3541Women Who Code
Node.js Madrid MadridESasíncronos 3529Alex Fernández
JavaScript MN MinneapolisUSJavaScripters 3414Randall Meeker
Code Oregon PortlandUSStudents 3413Jenny W
Meetup.js Buenos AiresARJavascripters 3254Juan Pablo Saraceno
js.la - The Los Angeles JavaScript meetup Santa MonicaUSJavaScriptianados 3242David Guttman
Chicago Node.js ChicagoUSMembers 3223Mike Hostetler
BarcelonaJS BarcelonaESJavaScripters 3152Giorgio Polvara
JSLovers DelhiINJSLovers 3138Neha Sharma
Seattle Node.js SeattleUSNode-jsers 3134Ryan Roemer
East Bay JavaScript Meetup Group OaklandUSJS Hackers 3132Dan McAulay
UtahJS Salt Lake CityUSJavaScriptafarians 3118Kip Lawrence
React Chicago ChicagoUSMembers 3118Bill Gloff
AngularMadrid MadridESAngulares 3100Juanfran
Jakarta Javascript User Group JakartaIDJavaScript Ninja 3097Hengki Sihombing
GDG Lagos LagosNGMembers 3090Femi TAIWO
KrakowJS KrakówPLJS pros 3084Krzysztof Kula
Seattle React.js SeattleUSMembers 3062Justin Soliz
React en Buenos Aires Buenos AiresARreactors 3037sebasjm
Node.js Dilli DelhiINHackers 3014Anup Bishnoi
NodeBR - São Paulo São PauloBRnoders 3013Erick Wendel
Manila JavaScript ManilaPHJS Developers 3009Thomas Laughlin
Node.js Denver/Boulder/Ft. Collins DenverUSMembers 2980Brooks Patton
DhakaJS DhakaBDMembers 2972Md. Azharul Islam
Women Who Code Portland PortlandUSCoders 2953Women Who Code
Jakarta Learns Programming JakartaIDLearners 2913Sigit Prayoga
JavaScriptLA Meetup Los AngelesUSJavaScript Ninjas 2845VJ
AngularBeers BarcelonaESMembers 2825David Pich
JSLovers-Bengaluru BangaloreINJSLovers 2816Vineet Ahuja
node.dc WashingtonUSNode programmers 2809Andrew Dunkman
HTML5 + JS Ciudad de México México CityMXMXL5 2808Alejandro
Node.js Meetup Berlin BerlinDEJavaScripters 2791Andreas Lubbe
SoCal Node.js Los AngelesUSNoders 2784David Aktary
Geek97 DelhiINGeeks 2776Dhananjay Kumar
Frontend Developer Meetup Amsterdam AmsterdamNLFrontend Developers 2761Frontend Love
Hack Reactor NYC New YorkUSFuture coders 2760Tyler Lambe
Web Developers Community Ra'ananaILMembers 2702Ori Calvo
JavaScript KC Kansas CityUSDevelopers 2699Josh Durham
The Digital Pond LondonGBDigital Ponderers 2680Siji Onabanjo
NodersJS SantiagoCLJavascript@s 2661Felipe Torres
Serverless San FranciscoUSMembers 2623Serverless User Group
London Node.js User Group LondonGBMembers 2619Adam Davis
Portland ReactJS PortlandUSreactivists 2618ben
Node.js Israel Tel Aviv-YafoILNoders 2615Lior Kesos
FranceJS ParisFRjavascripters 2603Julien Bouquillon [revolunet]
Coders in Rio Rio de JaneiroBRCoders 2603Rafael Cruz
AmsterdamJS AmsterdamNLJavaScripters 2601Robert Haritonov
Atlanta Nodejs Developers AtlantaUSNode.lers 2600Ryan Connelly
AngularTO TorontoCAMembers 2598Nick Van Weerdenburg
Triangle JavaScript DurhamUSMembers 2577Kyle Buchanan
Austin Node.js AustinUSnoders 2559Mike McNeil
vienna.js Vienna JavaScript User Group ViennaATJavaScripters 2533Roland Schütz
NashJS NashvilleUSmembers 2523Will
Phoenix JavaScript PhoenixUSJavaScript Enthusiasts 2512Sal Aiello
ng-sydney, Angular And Way More... SydneyAUAngular Developers 2499Meligy
Women Who Code Dallas/Ft. Worth DallasUSCoders 2447Women Who Code
Boston Node BostonUSMembers 2444Brian Sodano
South Bay JavaScript Meetup Mountain ViewUSjavascraps 2410Jackie Ho
Javascript Ankara AnkaraTRJavaScript Tutkunları 2388Ustun Ozgur
Jstanbul: Istanbul JavaScript User Group IstanbulTRNinjas 2385Fatih Kadir Akın
Client Side Technologies BangaloreINTechies 2371Gautham Pai
IT Development Café AmsterdamNLDevelopment Heroes 2363Luca Prak
life michael tel aviv Tel Aviv-YafoILMembers 2352Haim Michael
Polyglot Languages & Runtimes (Java, JVM, nodejs, Swift...) BangaloreINMembers 2345Rajeev Palanki
Free Code Camp Portland PortlandUSCampers 2335Brigette Eckert
BayNode - The Bay Area Node.js Meetup Mountain ViewUSCallbacks 2310Maureen
Node Melbourne MelbourneAUNodes 2294Andrey Sidorov
DigitalCrafts | Learn to Code in Atlanta AtlantaUSBuilders 2277Max M.
Modern Web UI Palo AltoUSMembers 2270Tracy
Bitcoin Cash Development Group LondonGBMembers 2255Kayo
Ottawa JavaScript OttawaCAMembers 2247Owain
LyonJS LyonFRJS lovers 2237Paul Mougel
Skyway Software Symposium MinneapolisUStech folk 2226Kevin Behrens
freeCodeCamp - Houston HoustonUSCampers 2220Jason Ephraim
Hyderabad Javascript Group HyderabadIN_javascripters 2207Ran.ga.na.than
London Javascript LondonGBDevs 2205christoffer noring
SeattleJS Hackers SeattleUSHackers 2200Sam Eubank
Uncoded | Long Beach Tech Meetups & Events Long BeachUSMembers 2173Mike Stewart
Lima NodeJS Meetup LimaPENodistas 2168Rein Petersen
GreeceJS AthensGRJavaScript devs 2164Elias Niaos
Serverless London LondonGBMembers 2153Serverless User Group
Learn to Code New York New YorkUSCoders 2150Galvanize
The JS Roundabout LondonGBJS Enthusiasts 2141Phill Bateman
DenverScript DenverUSScriptonites 2139Matt Webb
Ironhack Paris ParisFRIronhackers 2128Charlotte Bottemanne
Mentorship Saturdays PortlandUSMembers 2124Brad
Guadalajara JS GuadalajaraMXJavascripters 2114Orlando Del Aguila Febres
Front End Orlando CodePen OrlandoUSFront End Orlando CodePenners 2102David K
Dublin Node.js Meetup DublinIENoders 2087Sean Walsh
MakerSpace Charlotte CharlotteUSMakers 2086Benjamin Gatti
T.O.J. - Tales Of JavaScript San FranciscoUSMembers 2077Ann Burkett
Cambridge Developer Entrepreneur Networking Full Stack CambridgeUSMembers 2060Aaron K
PDXnode PortlandUSNodesters 2057Ben Michel
Vuejs Paris ParisFRVuers 2050Eduardo
The JavaScript Austin Meetup Group AustinUSJavaScripters 2049Johnathan Hebert
Dublin - Coder Forge DublinIECoders 2010Enda
React Amsterdam AmsterdamNLMembers 2007Robert Haritonov
BudapestJS BudapestHUJavaScript Ninjas 2003Gergely Németh
Fullstack Developers New YorkUS{{developers}} 1998Alexander David
Modern Web (Triangle) RaleighUSMembers 1987Tracy
Learn To Code Phoenix PhoenixUSMembers 1976Galvanize
EgyptJS CairoEGMembers 1976Mohamed Shaban
NodeUA KyivUAsoftware engineers 1974Timur Shemsedinov
Node.JS Boston BostonUSMembers 1973Freedom Dumlao
JavaScript Lab Paris ParisFRJS Hackers 1973Community Hackages
CopenhagenJS CopenhagenDKpeople 1936Kevin Simper
React Vancouver Meetup VancouverCAMembers 1935Eric Kim
IBM Code London LondonGBCoders 1901Mo Haghighi
Colombo JS Meetup ColomboLKdevelopers 1885Pasindu De Silva
Portland JavaScript Admirers PortlandUSAdmirers 1883Jim Kogler
Azure Dublin Meetup DublinIEAzurees 1881Bryan Conneely
JS Belgrade Meetup BelgradeRSMembers 1875Slobodan Stojanovic
Women Who Code Bangalore BangaloreINCoders 1871Women Who Code
DC Hack and Tell WashingtonUSHackers 1845Travis Hoppe
Angular X Paris ParisFRnew generation Angularians 1831Bertrand Piselli
London HalfStack LondonGBSoftware Engineers 1814Dylan Schiemann
Codeworks - Barcelona BarcelonaESCoders 1808Alessandro Zanardi
opensanca São CarlosBRMembros 1802Lucas Marques
MilwaukeeJS MilwaukeeUSJavaScripters 1791Tony Gemoll
Boulder JS BoulderUSMembers 1788Estella Gonzalez Madison
Ahmedabad AngularJS AhmedabadINMembers 1783Dipesh Patel
All Things Web Tech ChicagoUSTech Leaders 1779brian rodriguez
Azure Israel Tel Aviv-YafoILMembers 1772Israeli Azure
I Teach You Programming, So You Teach Me English! TokyoJPMembers 1767Hiroaki Yasutomo
Node.js and IBM Cloud Meetup BangaloreINMembers 1756Param Rao
Austin Coders & Hackers by The Tech^map AustinUSCoders & Hackers 1749Johan Borge
Angular Nigeria (ng)² LagosNGMembers 1748Christian Nwamba
BucharestJS BucharestROJS Hackers 1736Ciprian Borodescu
Beer.js Buenos Aires Buenos AiresARJavaScripters 1733Nicolás Gabriel Bevacqua
HH.js HamburgDEJavaScripters 1731Martin Kleppe
Node.js Jakarta JakartaIDnodejs farmers 1728Lukluk Luhuring Santoso
New York JavaScript Study Group New YorkUSJavascript Users 1728Robert LaMarca
BA Node.js Meetup Buenos AiresARNoders 1727Node Buenos Aires
Philadelphia JavaScript Developers PhiladelphiaUSJS Developers 1722Alex Clark
Code's Cool Dallas AddisonUScodescoolers 1716Steven Gangstead
GolangNYC New YorkUSGophers 1714Gray Herter
Bristol JS BristolGBMembers 1710Andrew McGregor
FullStack Cluj Cluj-NapocaROMembers 1697Paul Chirila
Node.js Philly PhiladelphiaUSNodes 1696Leomar Durán
Uszanowanko Programowanko GliwicePLDoges 1684Marcin Mazurek
Docker - Kubernetes - Openshift Hyderabad HyderabadINMembers 1675Chakradhar Rao Jonagam
Angular Belgium BrusselsBEAngularian 1662Yassine Gayl
MunichJS – JavaScript User Group MünchenDEMembers 1659Béla Varga
Meteor Egypt CairoEGMeteorites 1658Meteor Community Meetups
Hong Kong JavaScript and Node.js Hong KongHKDevelopers 1645Kevin Bluer
Tech nights in Medellín MedellínCOMembers 1636Sebastian Miranda
BandungJS BandungIDMembers 1632Zufrizal Yordan
Milano Frontend MilanoITFrontenders 1631Alessandro Muraro
Freelance Talks : Les Apéros Freelances & Tips ParisFRFreelances 1631FreelanceRepublik
Utah Node.js - Salt Lake City Salt Lake CityUSNode Ninjas 1630Aaron Seth Madsen
London Digital Design and Technology User Group LondonGBD&D's 1628Mark Young
Bay Area JavaScript Interview Prep Meetup SunnyvaleUSProblem Solver 1600Jack Wong
charmCityJs BaltimoreUSJavaScripters 1595Karl Groves
require('lx') - The JavaScript meetup in Lisbon LisbonPTJavaScripter 1586João Pinto Jerónimo
OpenHack Austin AustinUSOpenHackers 1578Joshua Johnson
SF Front-End Developers: Experience Engineering San FranciscoUSExperience Engineers 1567Ahmad Ansari
Dev.IL Tel Aviv-YafoILMembers 1561Tom Teman
Chennai JavaScript Meetup ChennaiINMembers 1541Abhishek Yadav
DFW Front end development DallasUSFEDs 1536Unni
ReactJS and Friends PuneINMembers 1529Vipul A M
DC Web Design, Development, Tech, and Media Authority WashingtonUSWeb Heads 1523Startup Central
Meteor Casablanca CasablancaMAMeteorites 1523Meteor Community Meetups
Nodeschool Istanbul IstanbulTRNodes 1523Arif Çakıroğlu