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

Name City Country Focus Members Contact Name
Virtual Java User Group LondonGBvJUGers 16447Simon Maple
Developers-BR São PauloBRDevs 14843Valerio Ferreira
Google Developer Group Silicon Valley Mountain ViewUSGoogle Developers 14033Peter Mooshammer
Tech in Motion Events: San Francisco San FranciscoUSTechnologists 13195Mandy Ivy
Tech in Motion: Washington DC ArlingtonUSTechnologists 11928Mandy Walker
The New York City Java Meetup Group New YorkUSJava enthusiasts 11563Dario Laverde
Full Stack Developers Israel Tel Aviv-YafoILFullstackers 11302Lior Kanfi
New York Software Engineers (NYSE) New YorkUSSoftware Engineers 9005Michael Latulippe
Tech in Motion: Silicon Valley San JoseUSTechnologists 8793Mandy
Istanbul Coders IstanbulTRCoder 8144Selim Öber
Agile Roundabout LondonGBAgile enthusiasts 8074Phill Bateman
Tech in Motion: Los Angeles Los AngelesUSTechnologists 7833Mandy
Tech In Motion: Orange County IrvineUSTechnologists 7565Mandy Walker
Tech in Motion: Philadelphia PhiladelphiaUSTechnologists 7429Mandy
LJC - London Java Community LondonGBJava Developers 7115Barry Cranford
Hacker Hours New YorkUSHaxors 6982Aidan Feldman
Silicon Valley Android Developers Palo AltoUSAndroid Developers & Users 6784davidcao01 SVE.io
Google Developer Group San Francisco @sf_gdg San FranciscoUSGoogle Developers 6691James Cha
The San Francisco Java User Group San FranciscoUSJava Developers 6608Pieter Humphrey
Silicon Valley Java User Group Mountain ViewUSJava Developers 6588Kevin Nilson
New York MongoDB User Group New YorkUSMembers 6532MongoDB
GDG Ahmedabad AhmedabadINTechnology Explorers 6383Paresh Mayani
Jforum Stockholm StockholmSEMembers 6306Mattias Karlsson
Bangalore JAVA User Group (BangaloreJUG) BangaloreINjuggie'z 6220Ranganath.S
Skills Matter - xMatters Keynote Series - Developer Events LondonGBsoftware craftspeople 6053Ariel - Skills Matter
London App Brewery LondonGBApp Makers 5681Philipp Muellauer
ThoughtWorks Geek Night - NCR DelhiINMembers 5559Avinash Chugh
Tech Interviews and Competitive Programming Mountain ViewUSSolution Finders 5349Jonathan R.
RIoT RaleighUSRIoTers 5337Tom Snyder
¿Por qué aprender a Programar? BogotáCONuevos Programadores 5069Cesar
Arte e Programação São PauloBRPessoas 5055Alexandre Villares
allegro Tech WarsawPLTechs 4997Janek P.
Bay Area Hackathons San FranciscoUSHackers 4923Raj
The San Francisco Android GDG San FranciscoUSAndroid Developers 4761Ty Smith
Amazon Web Services - Security, Virginia (and metro DC area) HerndonUSMembers 4737Kelly
Find a Tech Job LondonGBCareer Networkers 4651Samantha hepburn
London Software Craftsmanship Community LondonGBSoftware Crafters 4621Sandro Mancuso
Learn to code in 2019 LagosNGMembers 4565Adedipo Olagbegi
New York Android Developers New YorkUSMembers 4552Kevin Galligan
GOTO Nights CPH CopenhagenDKMembers 4495Tine Grarup
The Future is made in Javascript Tel Aviv-YafoILJavascripters 4447Yaron Biton
Berlin Hack and Tell BerlinDEHackers 4392Keith Corwin
GDG Cambridge, Boston and Metro, Google Developer Group CambridgeUSMembers 4316Steven Max Patterson
Women Who Code Berlin BerlinDEMembers 4289Women Who Code
Bogotá JVM Meetup BogotáCOdevelopers and entrepreneurs 4257Julian Espinel
AI Users Group UK LondonGBAI Specialists 4233Dan Harvey
Hyderabad Hadoop, Data science, AWS and IOT Group HyderabadINMembers 4218Arun Sirimalla
Java Meetup - Bangalore BangaloreINDukes 4195Ganesh Samarthyam
Stacja IT Warszawa WarsawPLMembers 4195Maria Nowakowska
Neo4j - London User Group LondonGBPeople 4187Neo4j
By ThoughtWorks Tech Talk Series MelbourneAUMembers 4150Karen Dumville
Developer User Group JohannesburgZASoftware Developers 4096Robert MacLean
GDG Paris ParisFRParticipants 4038Alain Regnier
Paris Android User Group ParisFRMembres 4000Stephane Guerin
Bay Area Android Developer San FranciscoUSDevelopers 3982Stephan Branczyk
Istanbul Spring Meetup IstanbulTRMembers 3962Erdem Gunay
São Paulo Java Meetup São PauloBRJaveiros 3857Bruno Marinho
Delhi MongoDB User Group DelhiINMembers 3821MongoDB
Melbourne Web Developers MelbourneAUDevs 3804Emma
AWS Seattle | Official Events SeattleUSMembers 3777Ross Barich
Istanbul Java User Group (JUG) - @jug_istanbul IstanbulTRMembers 3761Altug Bilgin Altintas
Seattle Android Developers SeattleUSAndroid Developers 3682Chris Pick
ny-scala New YorkUSScala Types 3565Dustin Whitney
Boston Software Engineers BostonUSSoftware Engineers 3532Michael Latulippe
Bay Area Full Stack Mountain ViewUSnvirters 3520Vikram Dham
London Scala Users' Group LondonGBEnthusiasts 3518Andy Hicks
GOTO Nights - London, UK LondonGBFriends 3516Maria Wennestam
Utah Java Users Group Salt Lake CityUSTechnologists 3505Jason Porter
Code Oregon PortlandUSStudents 3461Jenny W
ExpertTalks Manchester ManchesterGBExperts 3421Jon Dickinson
Developers Tel Aviv Tel Aviv-YafoILDevelopers 3383James Lebowitz
IT w Warszawie WarsawPLMembers 3356Jadex
Denver Java Users Group DenverUSJava Developers 3336Matt Raible
Java User Group Hamburg HamburgDEMitglieder 3264Uwe Sauerbrei
Mexico City JVM Group México CityMXDiscípulos JVM 3256JVM MX Organizer
GOTO Nights Amsterdam AmsterdamNLGotos 3252GOTO Nights
Memphis Technology User Groups MemphisUSTechies 3232Bryan Robinson
GDG Jakarta JakartaIDDevelopers 3188Putri Izzati
Android In Asia SingaporeSGAndroid Developers & Users 3187Khang Toh
NYC Tech Talks New YorkUSNYC Techies 3145Greg Whalin
Tech Talk DC ArlingtonUSPolyglots 3121Doguhan Uluca
WSO2 - Sri Lanka ColomboLKMembers 3084WSO2
Silicon Valley Mobile Developer meetup Palo AltoUSdevs 3058Suyash Joshi
Java.IL - the Israeli Java Community Tel Aviv-YafoILDevelopers 3057Haim Yadid
IT Development Café AmsterdamNLDevelopment Heroes 3057Luca Prak
Cleveland Big Data and Hadoop User Group ClevelandUSSuper Hadoopers 3017Doug Meil
eBay Europe Technology #ebaytechtalk BerlinDEeBay Hackers 2998Katja Sommer
The Boston Java Meetup Group CambridgeUSJava Developers 2987Kaj Kandler
NYC Codecademy Group New YorkUSCoders 2944Codecademy Staff
Java User Group - Hyderabad HyderabadINJava Nizams 2927Stephen Chin
GDG Kraków KrakówPLMembers 2918Mateusz Herych
Polyglot Languages & Runtimes (Java, JVM, nodejs, Swift...) BangaloreINMembers 2877Rajeev Palanki
Boston Apache Spark User Group CambridgeUSSpahk Enthusiasts 2858Joseph Kambourakis
GDG Dallas DallasUSGDG Dallas members 2849Luke Wallace
Paris.py (Python, Django & friends) ParisFRPythonistas 2846Sylvain Zimmer
SoCal Node.js Los AngelesUSNoders 2840David Aktary
Toronto Java Users Group TorontoCAMembers 2818Adib Saikali
Warszawa Java User Group (Warszawa JUG) WarsawPLWJUGowicze 2807Tomasz Szymanski
Polish Java User Group KrakówPLMembers 2801Konrad Malawski
Chicago Java Users Group ChicagoUSJava Enthusiasts 2787Janine Patterson
Java User Group Łódź ŁódźPLJugowicze 2787Stowarzyszenie JUG Łódź
Moscow Big Systems/Big Data MoscowRUMassive Scale Developers 2774Alexey Ragozin
Serverless San FranciscoUSMembers 2750Serverless User Group
3Pillar Product Innovation Group NoidaINProduct Innovators 2739Kapil Dhiman
London Dev Community LondonGBDeveloper, Manager, Architect 2691David Gimelle
Java User Group Argentina Buenos AiresARJavitos 2675Ramiro Rinaudo
Bay Area Mobile Mountain ViewUSBammers 2669A. Burkett
life michael tel aviv Tel Aviv-YafoILMembers 2661Haim Michael
Android254 NairobiKEdroiders 2651Priest Tamre
JAVA Colombo ColomboLKMembers 2645WSO2
Geeknight Coimbatore CoimbatoreINMembers 2625Selvakumar Natesan
Atlanta Java Users Group AtlantaUSDevelopers 2616Vincent Mayers
DC Droids - DC Android Developers, Designers, Enthusiast WashingtonUSAndroid Fans 2601Prasanna Perera
Jozi-JUG JohannesburgZAJVM Developers with Passion 2577Michael Williams
Ch'ti JUG LilleFRCh'ti juggers 2555Team Ch'ti JUG
Tech Next PuneINTech Enthusiasts 2515Mukund Rajamannar
Women Who Code Bangalore BangaloreINCoders 2514Women Who Code
Philippine Android Developers Community ManilaPHDroids 2500Evan Dale Aromin
MATH View Algorithm Design (MATHVAD) Palo AltoUSAlglorist Coders 2496Suresh B Velagapudi
Bristech BristolGBBristechnologists 2491James Phillpotts
DCJUG/Data Driven DC RestonUSMembers 2471Gray Herter
Developing with Data in San Francisco San FranciscoUSDevelopers 2449Scott Mitchell
Wroclaw JUG Meetup WroclawPLDevelopers 2447Mateusz Glapinski
GDG Baghdad BaghdadIQMembers 2443Safa Salwan
Women Who Code LA Culver CityUSCoders 2441Women Who Code
Carbon Five LA Hack Nights Santa MonicaUSHackers 2400Carbon Five
MadridJUG MadridESjuggers 2392Carlos Sierra
Duchess France Meetup ParisFRDuchess 2375Duchess France
The Ahmedabad Java Meetup Group AhmedabadINCronies 2361Amit Raj Tyagi
Poland CodiLime Tech Talk WarsawPLLimes 2355CodiLime
GDG Jalandhar JalandharINCommunity Member 2354Nitika Rajput
Skyway Software Symposium MinneapolisUStech folk 2353Kevin Behrens
Android Nigeria Community LagosNGMembers 2314Peter Ekene Eze
Montréal JUG MontréalCAMembers 2306Montreal JUG
Boston Data Science Career #ODSC BostonUSProfessionals 2305Sheamus
TLV - Android Academy Tel Aviv-YafoILAndroiders 2303Yonatan Levin
Scala at the Sea SeattleUSMembers 2296Nick Elsberry
London Code Skill Buddy LondonGBMembers 2296Raj
Today Software Magazine Cluj-NapocaROdevelopers 2281Ovidiu Matan
Paris Cassandra Meetup - by DataStax ParisFRCassandra Heroes 2253DataStax
ThinkJava Kharkiv KharkivUAУчастники 2246NIX Solutions ltd
Melbourne Java & JVM Users Group MelbourneAU0xCAFEBABEs 2242Kon Soulianidis
Women Who Code Manila ManilaPHAwesome Women Coders 2237Women Who Code
Realm San FranciscoUSDevelopers 2234Morgan Contreras
Ciklum Ukraine/Belarus knowledge sharing community KyivUAIT geeks 2221Julia
Women Who Code Chicago ChicagoUSCoders 2208Women Who Code
Java Usergroup Berlin-Brandenburg BerlinDEJavaianer 2190Joerg M.
javaBin Oslo OsloNOMembers 2177Dervis M
Denver Open Source Users Group DenverUSMembers 2176Mike Barker
Azure Israel Tel Aviv-YafoILMembers 2175Israeli Azure
Pune Spring Developers PuneINSpringDevs 2149Imteyaz Ahmad
DataKRK (formerly Cracow Hadoop User Group) KrakówPLMembers 2138Przemek Maciolek
GOTO Nights Chicago ChicagoUSGOTO'ers 2134Bianca Legorreta
Madison Area Software Developers Meetup Group MadisonUSSoftware Developers 2130Paul Miller
Amsterdam Java User Group AmsterdamNLAmsterdam JUGers 2123Vladimir Dejanović
Perú Java User Group LimaPEMembers 2123Eddú Meléndez
Android Meetup Bogotá BogotáCODesarrolladores Android 2103Santiago Carrillo
The Iron Yard - Charleston CharlestonUSMembers 2100Tom Wilson
Guadalajara Java User Group ZapopanMXJava Programmers 2097Christian Gomez
DevTalk LA Los AngelesUSMembers 2093Ken Dempster
OWASP Northern Virginia Chapter RestonUSMembers 2083OWASP Foundation
Utrecht Java User Group UtrechtNLUtrecht JUGers 2064Thodoris Bais
Singapore Spring User Group SingaporeSGSpring Developers 2055Sergiu Bodiu
it.roche.pl WarsawPLIT Professionals 2055Aleksandra Pagorska
Warsaw Data Tech Talks (Poland) WarsawPLWarsawDataTT members 2054Adam Kawa
ExpertTalks Portugal LisbonPTExperts 2032Nuno Marques
GDG Cochin KochiINGDG Dev Member 2030Ninto Anto
GDG Oslo OsloNOMembers 2018Thomas Bassetto
St. Louis Java User's Group Saint LouisUSMembers 2016Bruce Alspaugh
GeoDev Meetup Group - Northeast ArlingtonUSMembers 2009Amy Niessen
Austin Developer Community AustinUSProgrammers & Developers 1984George Pazdral
Serverless Turkey IstanbulTRMembers 1976Serverless User Group
Detroit Java User Group DetroitUSJUG Members 1974Matt Schuetze
DomCode UtrechtNLCoders 1971Lucas van Lierop
Algorithms and Data Structures New YorkUSDevelopers 1969Alexey Potapov
Learning Android Development San FranciscoUSMembers 1967Nathan Esquenazi
Java Vienna ViennaATMembers 1961Dominik Dorn
Tech Talent South - Columbus ColumbusUSTech Tribe Members 1951Tech Talent South
Greetings, SVBBDev - BlackBerry App Developers! Santa ClaraUSSVBBDev - BB App Developers 1940Ping Bartley
Tech Talks Israel Tel Aviv-YafoILMembers 1905Daniel Schwartzer
Trójmiasto Java User Group GdanskPLJava Geeks 1898Kuba Marchwicki
GDG Rabat RabatMADevelopers 1898gdg rabat
Tech Talks at Meetup New YorkUSTech Talks @ Meetup 1894Evan Estola
Clean Code Alliance Tel Aviv-YafoILClean Coders 1894Itzik Saban
Bash! BelfastGBMembers 1890Tara Simpson
Minnesota Azure User Group MinneapolisUSAzure Users 1874Tim Plas
WroclawIT WroclawPLMembers 1869Patka
Graph Database - San Francisco San FranciscoUSGraphistas 1859Neo4j
Silicon Valley Cloud Foundry User Group Palo AltoUSCloud Founders 1853Dave Nielsen
SoundCloud Tech Meetups - Berlin BerlinDEpeople 1852Vincent Garrigues
GDG Lille LilleFRMembres 1845Fanny Demey
Bot Builder Meetup - Bangalore BangaloreINTechies/Founders 1822Malay Warankar
Cleveland #learntocode Group ClevelandUStechies 1817Tech Elevator
EPAM IT Events St. PetersburgRUMembers 1805Polina Panyukova
Javaforum Göteborg GöteborgSEJava coders 1803Tomas Trolltoft
Montana Programmers BozemanUSMontana Programmers 1790Wes
Spring Meetup Paris ParisFRSpring Aficionado 1788Florent Biville
ExpertTalks Bengaluru BangaloreINExperts 1779Vishwas Bhagath
Android Devs Buenos Aires Buenos AiresARDesarrolladores 1769Julián Ezequiel Picó
Phx-Starters: Phoenix Startup Technology Round Table PhoenixUSPhx-Starters 1767Michael Fitzgerald