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

Name City Country Focus Members Contact Name
Virtual Java User Group LondonGBvJUGers 16101Simon Maple
Google Developer Group Silicon Valley Mountain ViewUSGoogle Developers 13506Peter Mooshammer
Tech in Motion Events: San Francisco San FranciscoUSTechnologists 13059Mandy Ivy
The New York City Java Meetup Group New YorkUSJava enthusiasts 11605Dario Laverde
Tech in Motion: Washington DC ArlingtonUSTechnologists 11396Mandy Walker
Developers-BR São PauloBRDevs 11309Valerio Ferreira
Fullstack Developers Israel Tel Aviv-YafoILFullstackers 10474Lior Kanfi
New York Software Engineers (NYSE) New YorkUSSoftware Engineers 8736Michael Latulippe
Tech in Motion: Silicon Valley San JoseUSTechnologists 8447Mandy
Tech in Motion: Los Angeles Los AngelesUSTechnologists 7541Mandy
The Agile Roundabout LondonGBAgile enthusiasts 7291Phill Bateman
Tech in Motion: Philadelphia PhiladelphiaUSTechnologists 7277Mandy
Tech In Motion: Orange County IrvineUSTechnologists 7168Mandy Walker
Istanbul Coders IstanbulTRCoder 6969Selim Öber
LJC - London Java Community LondonGBJava Developers 6888Barry Cranford
Silicon Valley Android Developers Palo AltoUSAndroid Developers & Users 6805davidcao01 SVE.io
Google Developer Group San Francisco @sf_gdg San FranciscoUSGoogle Developers 6669James Cha
Hacker Hours New YorkUSHaxors 6500Aidan Feldman
New York MongoDB User Group New YorkUSMembers 6488MongoDB
Silicon Valley Java User Group Mountain ViewUSJava Developers 6440Kevin Nilson
The San Francisco Java User Group San FranciscoUSJava Developers 6115Pieter Humphrey
GDG Ahmedabad AhmedabadINTechnology Explorers 5708Paresh Mayani
Bangalore JAVA User Group (BangaloreJUG) BangaloreINjuggie'z 5691Ranganath.S
London App Brewery LondonGBApp Makers 5639Philipp Muellauer
Skills Matter - X Matters Series - Developer Events LondonGBsoftware craftspeople 5578Melita Cawdell - Skills Matter
ThoughtWorks Geek Night - NCR DelhiINMembers 5156Avinash Chugh
Tech Interviews and Competitive Programming Mountain ViewUSSolution Finders 5141Jonathan R.
RIoT RaleighUSRIoTers 5027Tom Snyder
Bay Area Hackathons San FranciscoUSHackers 4961Raj
¿Por qué aprender a Programar? BogotáCONuevos Programadores 4819Cesar
The San Francisco Android GDG San FranciscoUSAndroid Developers 4627Ty Smith
Find a Tech Job LondonGBCareer Networkers 4624Samantha hepburn
Arte e Programação São PauloBRPessoas 4559Alexandre Villares
London Software Craftsmanship Community LondonGBSoftware Crafters 4444Sandro Mancuso
New York Android Developers New YorkUSMembers 4439Kevin Galligan
allegro Tech WarsawPLTechs 4411Janek P.
GDG Cambridge, Boston and Metro, Google Developer Group CambridgeUSMembers 4323Steven Max Patterson
Amazon Web Services - Virginia HerndonUSMembers 4302Kelly
AI Users Group UK LondonGBAI Specialists 4230Dan Harvey
GOTO Nights CPH CopenhagenDKMembers 4226Tine Grarup
Neo4j - London User Group LondonGBPeople 4204Neo4j
Hyderabad Hadoop, Data science, AWS and IOT Group HyderabadINMembers 4203Arun Sirimalla
Berlin Hack and Tell BerlinDEHackers 4173Keith Corwin
The Future is made in Javascript Tel Aviv-YafoILJavascripters 4071Yaron Biton
Jforum Stockholm StockholmSEMembers 4065Mattias Karlsson
Bay Area Android Developer San FranciscoUSDevelopers 3997Stephan Branczyk
GDG Paris - Google Developer Group ParisFRParticipants 3983Alain Regnier
Java Meetup - Bangalore BangaloreINDukes 3978Ganesh Samarthyam
Paris Android User Group ParisFRMembres 3955Stephane Guerin
Bogotá JVM Meetup BogotáCOdevelopers and entrepreneurs 3896Julian Espinel
Melbourne Web Developers MelbourneAUDevs 3792Emma
Developer User Group JohannesburgZASoftware Developers 3737Robert MacLean
Women Who Code Berlin BerlinDEMembers 3714Women Who Code
By ThoughtWorks tech-talk series MelbourneAUMembers 3675Karen Dumville
AWS Seattle | Official Events SeattleUSMembers 3641Ross Barich
Seattle Android Developers SeattleUSAndroid Developers 3633Chris Pick
Stacja IT Warszawa WarsawPLMembers 3610Maria Nowakowska
Istanbul Spring Meetup IstanbulTRMembers 3559Erdem Gunay
Boston Software Engineers BostonUSSoftware Engineers 3549Michael Latulippe
São Paulo Java Meetup São PauloBRJaveiros 3502Bruno Marinho
Bay Area Full Stack Mountain ViewUSnvirters 3498Vikram Dham
London Scala Users' Group LondonGBEnthusiasts 3460Andy Hicks
ny-scala New YorkUSScala Types 3454Dustin Whitney
GOTO Nights - London, UK LondonGBFriends 3448Maria Wennestam
Code Oregon PortlandUSStudents 3410Jenny W
Delhi MongoDB User Group DelhiINMembers 3396MongoDB
Istanbul Java User Group (JUG) - @jug_istanbul IstanbulTRMembers 3396Altug Bilgin Altintas
Developers Tel Aviv Tel Aviv-YafoILDevelopers 3362James Lebowitz
Utah Java Users Group Salt Lake CityUSTechnologists 3236Jason Porter
Tech Next PuneINTech Enthusiasts 3227Mukund Rajamannar
Denver Java Users Group DenverUSJava Developers 3167Matt Raible
NYC Tech Talks New YorkUSNYC Techies 3162Greg Whalin
Android In Asia SingaporeSGAndroid Developers & Users 3139Khang Toh
Silicon Valley Mobile Developer meetup Palo AltoUSdevs 3058Suyash Joshi
Mexico City JVM Group México CityMXDiscípulos JVM 3042JVM MX Organizer
WSO2 - Sri Lanka ColomboLKMembers 3026WSO2
Memphis Technology User Groups MemphisUSTechies 3024Bryan Robinson
eBay Europe Technology #ebaytechtalk BerlinDEeBay Hackers 3021Katja Sommer
Java User Group Hamburg HamburgDEMitglieder 3015Uwe Sauerbrei
IT w Warszawie WarsawPLMembers 3012Jadex
The Boston Java Meetup Group CambridgeUSJava Developers 3003Kaj Kandler
Tech Talk DC ArlingtonUSPolyglots 3000Doguhan Uluca
GOTO Nights Amsterdam AmsterdamNLGotos 2977Adele Carpenter
NYC Codecademy Group New YorkUSCoders 2920Codecademy Staff
Cleveland Big Data and Hadoop User Group ClevelandUSSuper Hadoopers 2903Doug Meil
Learn to code in 2018 LagosNGMembers 2872Adedipo Olagbegi
Java.IL - the Israeli Java Community Tel Aviv-YafoILDevelopers 2823Tomer Gabel
SoCal Node.js Los AngelesUSNoders 2802David Aktary
Boston Apache Spark User Group CambridgeUSSpahk Enthusiasts 2777Joseph Kambourakis
GDG Jakarta JakartaIDDevelopers 2748Putri Izzati
ExpertTalks Manchester ManchesterGBExperts 2747Jon Dickinson
3Pillar Product Innovation Group NoidaINProduct Innovators 2743Kapil Dhiman
Chicago Java Users Group ChicagoUSJava Enthusiasts 2695Janine Patterson
Bay Area Mobile Mountain ViewUSBammers 2687A. Burkett
Dallas Google Developer Group DallasUSGoogle Devs 2684Jennifer Weingarten McGee
Polish Java User Group KrakówPLMembers 2684Konrad Malawski
Java User Group - Hyderabad HyderabadINJava Nizams 2673Stephen Chin
London Dev Community LondonGBDeveloper, Manager, Architect 2669David Gimelle
Warszawa Java User Group (Warszawa JUG) WarsawPLWJUGowicze 2651Tomasz Szymanski
Java User Group Argentina Buenos AiresARJavitos 2646Ramiro Rinaudo
Serverless San FranciscoUSMembers 2639Serverless User Group
DC Droids - DC Android Developers, Designers, Enthusiast WashingtonUSAndroid Fans 2616Prasanna Perera
Toronto Java Users Group TorontoCAMembers 2593Adib Saikali
Paris.py (Python, Django & friends) ParisFRPythonistas 2573Sylvain Zimmer
Polyglot Languages & Runtimes (Java, JVM, nodejs, Swift...) BangaloreINMembers 2558Rajeev Palanki
IT Development Café AmsterdamNLDevelopment Heroes 2545Luca Prak
MATH View Algorithm Design (MATHVAD) Palo AltoUSAlglorist Coders 2523Suresh B Velagapudi
JAVA Colombo ColomboLKMembers 2520WSO2
Atlanta Java Users Group AtlantaUSDevelopers 2483Vincent Mayers
life michael tel aviv Tel Aviv-YafoILMembers 2463Haim Michael
Developing with Data in San Francisco San FranciscoUSDevelopers 2457Scott Mitchell
Jozi-JUG JohannesburgZAJVM Developers with Passion 2448Michael Williams
Carbon Five LA Hack Nights Santa MonicaUSHackers 2426Carbon Five
Moscow Big Systems/Big Data MoscowRUMassive Scale Developers 2422Alexey Ragozin
GDG Kraków KrakówPLMembers 2407Mateusz Herych
GDG Baghdad BaghdadIQMembers 2381Safa Salwan
DCJUG/Data Driven DC RestonUSMembers 2367Gray Herter
Ch'ti JUG LilleFRCh'ti juggers 2354Team Ch'ti JUG
The Ahmedabad Java Meetup Group AhmedabadINCronies 2331Amit Raj Tyagi
Bristech BristolGBBristechnologists 2314James Phillpotts
TLV - Android Academy Tel Aviv-YafoILAndroiders 2290Yonatan Levin
Technology Job Seekers Greater Boston BostonUSProfessionals 2288Maureen
Skyway Software Symposium MinneapolisUStech folk 2273Kevin Behrens
Realm San FranciscoUSDevelopers 2262S. Nayyer
Android254 NairobiKEdroiders 2233Priest Tamre
Paris Cassandra Meetup - by DataStax ParisFRCassandra Rebels 2215DataStax
Philippine Android Developers Community ManilaPHDroids 2196Evan Dale Aromin
Wroclaw JUG Meetup WroclawPLDevelopers 2192Mateusz Glapinski
Scala at the Sea SeattleUSMembers 2187Nick Elsberry
Women Who Code LA Culver CityUSCoders 2186Women Who Code
Geeknight Coimbatore CoimbatoreINMembers 2172Selvakumar Natesan
Today Software Magazine Cluj-NapocaROdevelopers 2169Ovidiu Matan
Duchess France Meetup ParisFRDuchess 2162Duchess France
Poland CodiLime Tech Talk WarsawPLLimes 2154CodiLime
MadridJUG MadridESjuggers 2148Carlos Sierra
Melbourne Java & JVM Users Group MelbourneAU0xCAFEBABEs 2143Kon Soulianidis
Java User Group Łódź ŁódźPLJugowicze 2143Stowarzyszenie JUG Łódź
The Iron Yard - Charleston CharlestonUSMembers 2121Tom Wilson
Android Nigeria Community LagosNGMembers 2103Peter Ekene Eze
Denver Open Source Users Group DenverUSMembers 2085Mike Barker
Montréal JUG MontréalCAMembers 2080Montreal JUG
Ciklum Ukraine/Belarus knowledge sharing community KyivUAIT geeks 2046Julia
Singapore Spring User Group SingaporeSGSpring Developers 2041Sergiu Bodiu
Madison Area Software Developers Meetup Group MadisonUSSoftware Developers 2032Paul Miller
Women Who Code Manila ManilaPHAwesome Women Coders 2026Women Who Code
GDG Jalandhar JalandharINCommunity Member 2019Nitika Rajput
Perú Java User Group LimaPEMembers 2012Eddú Meléndez
ThinkJava Kharkiv KharkivUAУчастники 2001NIX Solutions ltd
DevTalk LA Los AngelesUSMembers 2000Ken Dempster
London Mobile & Web App Development Meetup LondonGBMembers 1997Raj
javaBin Oslo OsloNOMembers 1993Dervis M
GeoDev Meetup Group - Northeast WashingtonUSMembers 1978Amy Niessen
Algorithms and Data Structures New YorkUSDevelopers 1971Maggie
Warsaw Hadoop User Group (Poland) WarsawPLWHUGers 1967Adam Kawa
OWASP Northern Virginia Chapter RestonUSMembers 1963OWASP Foundation
DataKRK (formerly Cracow Hadoop User Group) KrakówPLMembers 1960Przemek Maciolek
Learning Android Development San FranciscoUSMembers 1955Nathan Esquenazi
Google Developers Group Oslo (GDG) OsloNOMembers 1951Thomas Bassetto
Greetings, SVBBDev - BlackBerry App Developers! Santa ClaraUSSVBBDev - BB App Developers 1943Ping Bartley
Women Who Code Bangalore BangaloreINCoders 1929Women Who Code
Java Usergroup Berlin-Brandenburg BerlinDEJavaianer 1929Joerg M.
Austin Programmer Community AustinUSProgrammers & Developers 1907George Pazdral
Tech Talks at Meetup New YorkUSTech Talks @ Meetup 1906Evan Estola
Women Who Code Chicago ChicagoUSCoders 1896Women Who Code
Tech Talks Israel Tel Aviv-YafoILMembers 1895Daniel Schwartzer
St. Louis Java User's Group Saint LouisUSMembers 1887Bruce Alspaugh
Detroit Java User Group DetroitUSJUG Members 1868Matt Schuetze
SoundCloud Tech Meetups - Berlin BerlinDEpeople 1868Vincent Garrigues
Pune Spring Developers PuneINSpringDevs 1866Imteyaz Ahmad
Azure Israel Tel Aviv-YafoILMembers 1862Israeli Azure
Android Meetup Bogotá BogotáCODesarrolladores Android 1851Santiago Carrillo
Silicon Valley Cloud Foundry User Group Palo AltoUSCloud Founders 1847Dave Nielsen
Graph Database - San Francisco San FranciscoUSGraphistas 1844Neo4j
DomCode UtrechtNLCoders 1824Lucas van Lierop
Bot Builder Meetup - Bangalore BangaloreINTechies/Founders 1819Malay Warankar
Guadalajara Java User Group ZapopanMXJava Programmers 1817Christian Gomez
The Iron Yard - Indianapolis IndianapolisUSLearners 1792Aaron Kopel
Trójmiasto Java User Group GdanskPLJava Geeks 1771Kuba Marchwicki
Java Vienna ViennaATMembers 1770Dominik Dorn
All Things Web Tech ChicagoUSTech Leaders 1768brian rodriguez
Montana Programmers KalispellUSMontana Programmers 1763Wes
Bash! BelfastGBMembers 1761Tara Simpson
Clean Code Alliance Tel Aviv-YafoILClean Coders 1757Itzik Saban
it.roche.pl WarsawPLIT Professionals 1735Aleksandra Pagorska
London Code Dojo LondonGBDevelopers 1717@sleepyfox
Cleveland #learntocode Group ClevelandUStechies 1715Tech Elevator
New York City Real-Time Stream Processing User Group New YorkUSStorm Chasers 1708Eugene Dvorkin
Phx-Starters: Phoenix Startup Technology Round Table PhoenixUSPhx-Starters 1701Michael Fitzgerald
Amsterdam Java User Group AmsterdamNLAmsterdam JUGers 1696Vladimir Dejanović
Pune Java User Group PuneINJava Developers 1692Saager Mhatre
Los Angeles Android Developers + Mobile Developer Meetup Beverly HillsUSAndroid Developers 1692Dakotta
Lagos Software Engineering Group LagosNGMembers 1678Kehinde Adewusi
Javaforum Göteborg GöteborgSEJava coders 1675Tomas Trolltoft
GDG Philadelphia PhiladelphiaUSAllies 1671John Mahoney
Seattle Data Engineering SeattleUSData Engineers 1670Galvanize
Tech nights in Medellín MedellínCOMembers 1663Sebastian Miranda
Minnesota Azure User Group MinneapolisUSAzure Users 1661Tim Plas
GDG Cochin KochiINGDG Dev Member 1658Ninto Anto
GDG Lille LilleFRMembres 1648Fanny Demey
ExpertTalks Bengaluru BangaloreINExperts 1644Vishwas Bhagath