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

Name City Country Focus Members Contact Name
Virtual Java User Group LondonGBvJUGers 16460Simon Maple
Developers-BR São PauloBRDevs 15811Valerio Ferreira
Google Developer Group Silicon Valley Mountain ViewUSGoogle Developers 14116Peter Mooshammer
Tech in Motion Events: San Francisco San FranciscoUSTechnologists 13324Mandy Ivy
Tech in Motion: Washington DC ArlingtonUSTechnologists 12020Mandy Walker
Full Stack Developers Israel Tel Aviv-YafoILFullstackers 11585Lior Kanfi
The New York City Java Meetup Group New YorkUSJava enthusiasts 11541Dario Laverde
New York Software Engineers (NYSE) New YorkUSSoftware Engineers 9002Michael Latulippe
Tech in Motion: Silicon Valley San JoseUSTechnologists 8936Mandy
Istanbul Coders IstanbulTRCoder 8349Selim Öber
Agile Roundabout LondonGBAgile enthusiasts 8324Phill Bateman
Tech in Motion: Los Angeles Los AngelesUSTechnologists 8005Mandy
Tech In Motion: Orange County IrvineUSTechnologists 7681Mandy Walker
Tech in Motion: Philadelphia PhiladelphiaUSTechnologists 7507Mandy
LJC - London Java Community LondonGBJava Developers 7162Barry Cranford
Hacker Hours New YorkUSHaxors 7140Aidan Feldman
Jforum Stockholm StockholmSEMembers 7056Mattias Karlsson
GDG San Francisco @sf_gdg San FranciscoUSTechies 6808Patti Shin
Silicon Valley Android Developers Palo AltoUSAndroid Developers & Users 6773davidcao01 SVE.io
The San Francisco Java User Group San FranciscoUSJava Developers 6765Pieter Humphrey
Silicon Valley Java User Group Mountain ViewUSJava Developers 6625Kevin Nilson
GDG Ahmedabad AhmedabadINTechnology Explorers 6580Paresh Mayani
New York MongoDB User Group New YorkUSMembers 6546MongoDB
Bangalore JAVA User Group (BangaloreJUG) BangaloreINjuggie'z 6325Ranganath.S
Skills Matter - xMatters Keynote Series - Developer Events LondonGBsoftware craftspeople 6210Ariel - Skills Matter
ThoughtWorks Geek Night - NCR DelhiINMembers 5772Avinash Chugh
London App Brewery LondonGBApp Makers 5727Philipp Muellauer
RIoT RaleighUSRIoTers 5405Tom Snyder
Tech Interviews and Competitive Programming Mountain ViewUSSolution Finders 5397Jonathan R.
Aprende a Programar con BIT BogotáCONuevos Programadores 5223Cesar
Arte e Programação São PauloBRPessoas 5214Alexandre Villares
allegro Tech WarsawPLTechs 5167Janek P.
Learn to code in 2019 LagosNGMembers 5115Adedipo Olagbegi
Bay Area Hackathons San FranciscoUSHackers 4906Raj
The San Francisco Android GDG San FranciscoUSAndroid Developers 4792Ty Smith
Amazon Web Services - Security, Virginia (and metro DC area) HerndonUSMembers 4786Kelly
London Software Craftsmanship Community LondonGBSoftware Crafters 4682Sandro Mancuso
Find a Tech Job LondonGBCareer Networkers 4645Samantha hepburn
New York Android Developers New YorkUSMembers 4582Kevin Galligan
GOTO Nights CPH CopenhagenDKMembers 4554Tine Grarup
Women Who Code Berlin BerlinDEMembers 4537Women Who Code
Stacja IT Warszawa WarsawPLMembers 4521Maria Nowakowska
The Future is made in Javascript Tel Aviv-YafoILJavascripters 4497Yaron Biton
Berlin Hack and Tell BerlinDEHackers 4444Keith Corwin
Bogotá JVM Meetup BogotáCOdevelopers and entrepreneurs 4407Julian Espinel
By ThoughtWorks Tech Talk Series MelbourneAUMembers 4321Karen Dumville
GDG Cambridge, Boston and Metro, Google Developer Group CambridgeUSMembers 4316Steven Max Patterson
Java Meetup - Bangalore BangaloreINDukes 4288Ganesh Samarthyam
Developer User Group JohannesburgZASoftware Developers 4255Robert MacLean
Hyderabad Hadoop, Data science, AWS and IOT Group HyderabadINMembers 4226Arun Sirimalla
AI Users Group UK LondonGBAI Specialists 4224Dan Harvey
Neo4j - London User Group LondonGBPeople 4178Neo4j
Istanbul Spring Meetup IstanbulTRMembers 4139Erdem Gunay
GDG Paris ParisFRParticipants 4045Alain Regnier
Paris Android User Group ParisFRMembres 4032Stephane Guerin
Delhi MongoDB User Group DelhiINMembers 4000MongoDB
Bay Area Android Developer San FranciscoUSDevelopers 3979Stephan Branczyk
São Paulo Java Meetup São PauloBRJaveiros 3949Bruno Marinho
Istanbul Java User Group (JUG) - @jug_istanbul IstanbulTRMembers 3870Altug Bilgin Altintas
Melbourne Web Developers MelbourneAUDevs 3807Emma
AWS Seattle | Official Events SeattleUSMembers 3778Ross Barich
Seattle Android Developers SeattleUSAndroid Developers 3682Chris Pick
GDG Jakarta JakartaIDDevelopers 3645Putri Izzati
Utah Java Users Group Salt Lake CityUSTechnologists 3591Jason Porter
ny-scala New YorkUSScala Types 3577Dustin Whitney
ExpertTalks Manchester ManchesterGBExperts 3547Jon Dickinson
London Scala Users' Group LondonGBEnthusiasts 3542Andy Hicks
Boston Software Engineers BostonUSSoftware Engineers 3534Michael Latulippe
Bay Area Full Stack Mountain ViewUSnvirters 3526Vikram Dham
Code Oregon PortlandUSStudents 3520Jenny W
GOTO Nights - London, UK LondonGBFriends 3506Maria Wennestam
IT w Warszawie WarsawPLMembers 3471Jadex
Denver Java Users Group DenverUSJava Developers 3389Matt Raible
Developers Tel Aviv Tel Aviv-YafoILDevelopers 3387James Lebowitz
Memphis Technology User Groups MemphisUSTechies 3350Bryan Robinson
Java User Group Hamburg HamburgDEMitglieder 3348Uwe Sauerbrei
Mexico City JVM Group México CityMXDiscípulos JVM 3343JVM MX Organizer
GOTO Nights Amsterdam AmsterdamNLGotos 3340GOTO Nights
GDG Kraków KrakówPLMembers 3276Mateusz Herych
Tech Talk DC ArlingtonUSPolyglots 3225Doguhan Uluca
Android In Asia SingaporeSGAndroid Developers & Users 3215Khang Toh
NYC Tech Talks New YorkUSNYC Techies 3141Greg Whalin
IT Development Café AmsterdamNLDevelopment Heroes 3121Luca Prak
WSO2 - Sri Lanka ColomboLKMembers 3093WSO2
Java.IL - the Israeli Java Community Tel Aviv-YafoILDevelopers 3091Haim Yadid
Java User Group - Hyderabad HyderabadINJava Nizams 3076Stephen Chin
Cleveland Big Data and Hadoop User Group ClevelandUSSuper Hadoopers 3072Doug Meil
NYC Codecademy Group New YorkUSCoders 3049Codecademy Staff
Polyglot Languages & Runtimes (Java, JVM, nodejs, Swift...) BangaloreINMembers 3047Gireesh Punathil
Silicon Valley Mobile Developer meetup Palo AltoUSdevs 3047Suyash Joshi
eBay Europe Technology BerlinDEeBay Hackers 2987Katja Sommer
Boston Apache Spark User Group CambridgeUSSpahk Enthusiasts 2985Joseph Kambourakis
The Boston Java Meetup Group CambridgeUSJava Developers 2969Kaj Kandler
Paris.py (Python, Django & friends) ParisFRPythonistas 2947Sylvain Zimmer
Java User Group Łódź ŁódźPLJugowicze 2908Stowarzyszenie JUG Łódź
GDG Dallas DallasUSGDG Dallas members 2884Luke Wallace
Toronto Java Users Group TorontoCAMembers 2878Adib Saikali
Warszawa Java User Group (Warszawa JUG) WarsawPLWJUGowicze 2870Tomasz Szymanski
Android254 NairobiKEdroiders 2868Priest Tamre
Moscow Big Systems/Big Data MoscowRUMassive Scale Developers 2861Alexey Ragozin
SoCal Node.js Los AngelesUSNoders 2851David
Polish Java User Group KrakówPLMembers 2837Konrad Malawski
Chicago Java Users Group ChicagoUSJava Enthusiasts 2819Janine Patterson
life michael tel aviv Tel Aviv-YafoILMembers 2816Haim Michael
Geeknight Coimbatore CoimbatoreINMembers 2782Selvakumar Natesan
Serverless San FranciscoUSMembers 2756Serverless User Group
3Pillar Product Innovation Group NoidaINProduct Innovators 2743Kapil Dhiman
London Dev Community LondonGBDeveloper, Manager, Architect 2701David Gimelle
Atlanta Java Users Group AtlantaUSDevelopers 2689Vincent Mayers
Java User Group Argentina Buenos AiresARJavitos 2686Ramiro Rinaudo
Bay Area Mobile Mountain ViewUSBammers 2664A. Burkett
JAVA Colombo ColomboLKMembers 2642WSO2
Women Who Code Bangalore BangaloreINCoders 2642Women Who Code
Android Nigeria Community LagosNGMembers 2637Peter Ekene Eze
Jozi-JUG JohannesburgZAJVM Developers with Passion 2627Michael Williams
Philippine Android Developers Community ManilaPHDroids 2617Evan Dale Aromin
Ch'ti JUG LilleFRCh'ti juggers 2615Team Ch'ti JUG
DC Droids - DC Android Developers, Designers, Enthusiast WashingtonUSAndroid Fans 2597Gowri
Bristech BristolGBBristechnologists 2550James Phillpotts
Wroclaw JUG Meetup WroclawPLDevelopers 2533Mateusz Glapinski
Tech Next PuneINTech Enthusiasts 2519Mukund Rajamannar
GDG Baghdad BaghdadIQMembers 2516Safa Salwan
Duchess France Meetup ParisFRDuchess 2497Duchess France
Women Who Code LA Culver CityUSCoders 2495Women Who Code
DCJUG/Data Driven DC RestonUSMembers 2493Gray Herter
MATH View Algorithm Design (MATHVAD) Palo AltoUSAlglorist Coders 2479Suresh B Velagapudi
Developing with Data in San Francisco San FranciscoUSDevelopers 2450Scott Mitchell
Poland CodiLime Tech Talk WarsawPLLimes 2439CodiLime
London Code Skill Buddy - Learn Coding Get a Tech Job LondonGBMembers 2438Raj
GDG Jalandhar JalandharINCommunity Member 2429Nitika Rajput
MadridJUG MadridESjuggers 2423Carlos Sierra
Carbon Five LA Hack Nights Santa MonicaUSHackers 2394Carbon Five
The Ahmedabad Java Meetup Group AhmedabadINCronies 2374Amit Raj Tyagi
Women Who Code Manila ManilaPHAwesome Women Coders 2367Women Who Code
Skyway Software Symposium MinneapolisUStech folk 2349Kevin Behrens
Montréal JUG MontréalCAMembers 2345Montreal JUG
Paris Cassandra Meetup - by DataStax ParisFRCassandra Heroes 2340DataStax
Scala at the Sea SeattleUSMembers 2333Nick Elsberry
Perú Java User Group LimaPEMembers 2325Eddú Meléndez
Today Software Magazine Cluj-NapocaROdevelopers 2322Ovidiu Matan
Melbourne Java & JVM Users Group MelbourneAU0xCAFEBABEs 2317Kon Soulianidis
TLV - Android Academy Tel Aviv-YafoILAndroiders 2307Yonatan Levin
Ciklum Ukraine/Belarus knowledge sharing community KyivUAIT geeks 2303Julia
Women Who Code Chicago ChicagoUSCoders 2283Women Who Code
it.roche.pl WarsawPLIT Professionals 2282Lukasz H
Azure Israel Tel Aviv-YafoILMembers 2271Israeli Azure
Amsterdam Java User Group AmsterdamNLAmsterdam JUGers 2251Vladimir Dejanović
Java Usergroup Berlin-Brandenburg BerlinDEJavaianer 2250Joerg M.
ThinkJava Kharkiv KharkivUAУчастники 2248NIX Solutions ltd
Realm San FranciscoUSDevelopers 2224Morgan Contreras
Android Meetup Bogotá BogotáCODesarrolladores Android 2211Santiago Carrillo
GOTO Nights Chicago ChicagoUSGOTO'ers 2203Bianca Legorreta
javaBin Oslo OsloNOMembers 2200Dervis M
Denver Open Source Users Group DenverUSMembers 2188Mike Barker
Pune Spring Developers PuneINSpringDevs 2187Imteyaz Ahmad
Madison Area Software Developers Meetup Group MadisonUSSoftware Developers 2167Paul Miller
ExpertTalks Portugal LisbonPTExperts 2155Nuno Marques
DataKRK (formerly Cracow Hadoop User Group) KrakówPLMembers 2146Przemek Maciolek
Guadalajara Java User Group ZapopanMXJava Programmers 2141Christian Gomez
GDG Cochin KochiINGDG Dev Member 2138Ninto Anto
OWASP Northern Virginia Chapter RestonUSMembers 2135OWASP Foundation
DevTalk LA Los AngelesUSMembers 2133Ken Dempster
Warsaw Data Tech Talks (Poland) WarsawPLWarsawDataTT members 2110Adam Kawa
Utrecht Java User Group UtrechtNLUtrecht JUGers 2108Thodoris Bais
The Iron Yard - Charleston CharlestonUSMembers 2090Tom Wilson
GeoDev Meetup Group - Northeast ArlingtonUSMembers 2079Amy Niessen
Singapore Spring User Group SingaporeSGSpring Developers 2061Sergiu Bodiu
GDG Oslo OsloNOMembers 2058Thomas Bassetto
Tech Talent South - Columbus ColumbusUSTech Tribe Members 2053Tech Talent South
St. Louis Java User's Group Saint LouisUSMembers 2048Bruce Alspaugh
Java Vienna ViennaATMembers 2048Dominik Dorn
DomCode UtrechtNLCoders 2014Lucas van Lierop
Detroit Java User Group DetroitUSJUG Members 2012Matt Schuetze
EPAM IT Events St. PetersburgRUMembers 1993Polina Panyukova
Austin Developer Community AustinUSProgrammers & Developers 1993George Pazdral
Serverless Turkey IstanbulTRMembers 1985Serverless User Group
Algorithms and Data Structures New YorkUSDevelopers 1980Alexey Potapov
Learning Android Development San FranciscoUSMembers 1971Nathan Esquenazi
Minnesota Azure User Group MinneapolisUSAzure Users 1959Tim Plas
Trójmiasto Java User Group GdanskPLJava Geeks 1955Kuba Marchwicki
GDG Rabat RabatMADevelopers 1954gdg rabat
Greetings, SVBBDev - BlackBerry App Developers! Santa ClaraUSSVBBDev - BB App Developers 1941Ping Bartley
WroclawIT WroclawPLMembers 1916Patka
Clean Code Alliance Tel Aviv-YafoILClean Coders 1907Itzik Saban
Tech Talks Israel Tel Aviv-YafoILMembers 1905Daniel Schwartzer
Tech@Agoda BangkokTHAgodians 1904Leonid Olevsky
Bash! BelfastGBMembers 1902Tara Simpson
Tech Talks at Meetup New YorkUSTech Talks @ Meetup 1891Evan Estola
Spring Meetup Paris ParisFRSpring Aficionado 1884Florent Biville
Cleveland #learntocode Group ClevelandUStechies 1880Tech Elevator
GDG Lille LilleFRMembres 1877Fanny Demey
Graph Database - San Francisco San FranciscoUSGraphistas 1861Neo4j
Silicon Valley Cloud Foundry User Group Palo AltoUSCloud Founders 1853Dave Nielsen
SoundCloud Tech Meetups - Berlin BerlinDEpeople 1848Vincent Garrigues
Android Devs Buenos Aires Buenos AiresARDesarrolladores 1840Julián Ezequiel Picó
Javaforum Göteborg GöteborgSEJava coders 1825Tomas Trolltoft
Bot Builder Meetup - Bangalore BangaloreINTechies/Founders 1819Malay Warankar
Austin Software Engineers & App Developers AustinUSSoftware Engineers/Developers 1804Chris Requena
Montana Programmers BozemanUSMontana Programmers 1803Wes
Developers.nl Meetup RotterdamNLDevelopers, software programmers 1802Developers.nl B.V.