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

Name City Country Focus Members Contact Name
Virtual Java User Group LondonGBvJUGers 15623Simon Maple
Google Developer Group Silicon Valley Mountain ViewUSGoogle Developers 13193Peter Mooshammer
Tech in Motion Events: San Francisco San FranciscoUSTechnologists 13095Mandy Ivy
The New York City Java Meetup Group New YorkUSJava enthusiasts 11359Dario Laverde
Tech in Motion: Washington DC ArlingtonUSTechnologists 10947Mandy Walker
Fullstack Developers Israel Tel Aviv-YafoILFullstackers 10040Lior Kanfi
New York Software Engineers (NYSE) New YorkUSSoftware Engineers 8628Michael Latulippe
Developers-BR São PauloBRDevs 8621Valerio Ferreira
Tech in Motion: Silicon Valley San JoseUSTechnologists 8257Mandy
Tech in Motion: Los Angeles Los AngelesUSTechnologists 7371Mandy
Tech in Motion: Philadelphia PhiladelphiaUSTechnologists 7124Mandy
San Francisco & Silicon Valley Android Developers Meetup Palo AltoUSAndroid Developers & Users 6811David Cao SVE.io
VanDev: Vancouver's Software Developers Network VancouverCASoftware Industry Professionals 6808Cliff Hammerschmidt
LJC - London Java Community LondonGBJava Developers 6723Barry Cranford
Tech In Motion: Orange County IrvineUSTechnologists 6674Mandy Walker
The Agile Roundabout LondonGBAgile enthusiasts 6451Phill Bateman
New York MongoDB User Group New YorkUSMembers 6440MongoDB
Silicon Valley Java User Group Mountain ViewUSJava Developers 6338Kevin Nilson
Istanbul Coders IstanbulTRCoder 6246Selim Öber
Hacker Hours New YorkUSHaxors 6173Aidan Feldman
Google Developer Group San Francisco @sf_gdg San FranciscoUSGoogle Developers 6101James Cha
The San Francisco Java User Group San FranciscoUSJava Developers 5838Pieter Humphrey
London App Brewery LondonGBApp Makers 5570Philipp Muellauer
Skills Matter - X Matters Series - Free Developer Events LondonGBsoftware craftspeople 5332Melita Cawdell - Skills Matter
Bangalore JAVA User Group (BangaloreJUG) BangaloreINjuggie'z 5206Ranganath.S
GDG Ahmedabad AhmedabadINTechnology Explorers 4992Paresh Mayani
Bay Area Hackathons San FranciscoUSHackers 4957Raj
Tech Interviews and Competitive Programming Mountain ViewUSSolution Finders 4920Jonathan R.
ThoughtWorks Geek Night - NCR DelhiINMembers 4838Avinash Chugh
¿Por qué aprender a Programar? BogotáCONuevos Programadores 4790Cesar
Find a Tech Job LondonGBCareer Networkers 4573Samantha hepburn
RIoT RaleighUSRIoTers 4455Tom Snyder
The San Francisco Android GDG San FranciscoUSAndroid Developers 4424Ty Smith
London Software Craftsmanship Community LondonGBSoftware Crafters 4354Sandro Mancuso
New York Android Developers New YorkUSMembers 4345Kevin Galligan
GDG Cambridge, Boston and Metro, Google Developer Group CambridgeUSMembers 4316Steven Max Patterson
Hyderabad Hadoop, Data science, AWS and IOT Group HyderabadINMembers 4166Arun Sirimalla
Neo4j - London User Group LondonGBPeople 4146Neo4j
Arte e Programação São PauloBRPessoas 4130Alexandre Villares
AI Users Group UK LondonGBAI Specialists 4109Dan Harvey
Amazon Web Services - Virginia HerndonUSMembers 4025Kelly
Berlin Hack and Tell BerlinDEHackers 4016Keith Corwin
allegro Tech WarsawPLTechs 3984Janek P.
Bay Area Android Developer San FranciscoUSDevelopers 3971Stephan Branczyk
Java Meetup - Bangalore BangaloreINDukes 3908Ganesh Samarthyam
The Future is made in Javascript Tel Aviv-YafoILJavascripters 3890Yaron Biton
Paris Android User Group ParisFRMembres 3886Stephane Guerin
GOTO Nights CPH CopenhagenDKMembers 3863Tine Grarup
GDG Paris - Google Developer Group ParisFRParticipants 3850Alain Regnier
Melbourne Web Developers MelbourneAUDevs 3793Emma
Bogotá JVM Meetup BogotáCOdevelopers and entrepreneurs 3599Julian Espinel
Boston Software Engineers BostonUSSoftware Engineers 3568Michael Latulippe
Seattle Android Developers SeattleUSAndroid Developers 3552Chris Pick
AWS Seattle | Official Events SeattleUSMembers 3467Ross Barich
ny-scala New YorkUSScala Types 3438Dustin Whitney
Code Oregon PortlandUSStudents 3434Jenny W
Developer User Group JohannesburgZASoftware Developers 3430Robert MacLean
GOTO Nights - London, UK LondonGBFriends 3394Maria Wennestam
London Scala Users' Group LondonGBEnthusiasts 3376Andy Hicks
GDG Tel Aviv Tel Aviv-YafoILGDGers 3358James Lebowitz
Women Who Code Berlin BerlinDEMembers 3329Women Who Code
Bay Area Full Stack Mountain ViewUSnvirters 3319Vikram Dham
Delhi MongoDB User Group DelhiINMembers 3315MongoDB
São Paulo Java Meetup São PauloBRJaveiros 3286Fernando Boaglio
By ThoughtWorks tech-talk series MelbourneAUMembers 3227Karen Dumville
Istanbul Java User Group (JUG) IstanbulTRMembers 3225Altug Bilgin Altintas
Tech Next PuneINTech Enthusiasts 3222Mukund Rajamannar
NYC Tech Talks New YorkUSNYC Techies 3183Greg Whalin
Stacja IT Warszawa WarsawPLMembers 3142Maria Świdniak
Android In Asia SingaporeSGAndroid Developers & Users 3089Khang Toh
Hadoop-DC WashingtonUSHadoop-DC members 3077MG
Silicon Valley Mobile Developer meetup Palo AltoUSdevs 3074Suyash Joshi
Utah Java Users Group Salt Lake CityUSTechnologists 3038Jason Porter
eBay Europe Technology #ebaytechtalk BerlinDEeBay Hackers 3038Katja Sommer
Denver Java Users Group DenverUSJava Developers 3034Matt Raible
The Boston Java Meetup Group CambridgeUSJava Developers 3015Kaj Kandler
Istanbul Spring Meetup IstanbulTRMembers 3012Erdem Gunay
WSO2 - Sri Lanka ColomboLKMembers 2982WSO2
NYC Codecademy Group New YorkUSCoders 2884Codecademy Staff
Memphis Technology User Groups MemphisUSTechies 2869Bryan Robinson
Tech Talk DC ArlingtonUSPolyglots 2829Doguhan Uluca
Mexico City JVM Group México CityMXDiscípulos JVM 2819JVM MX Organizer
Java User Group Hamburg HamburgDEMitglieder 2806Daniel Galán y Martins
SoCal Node.js Los AngelesUSNoders 2770David Aktary
IT w Warszawie WarsawPLMembers 2750Jadex
Bay Area Mobile Mountain ViewUSBammers 2709A. Burkett
Cleveland Big Data and Hadoop User Group ClevelandUSSuper Hadoopers 2702Doug Meil
Java.IL - the Israeli Java Community Tel Aviv-YafoILDevelopers 2689Tomer Gabel
London Dev Community LondonGBDeveloper, Manager, Architect 2672David Gimelle
Boston Apache Spark User Group CambridgeUSSpahk Enthusiasts 2637Joseph Kambourakis
3Pillar Product Innovation Group NoidaINProduct Innovators 2636Kapil Dhiman
Java User Group Argentina Buenos AiresARJavitos 2618Ramiro Rinaudo
DC Droids - DC Android Developers, Designers, Enthusiast WashingtonUSAndroid Fans 2617Prasanna Perera
GOTO Nights Amsterdam AmsterdamNLGotos 2612Adele Carpenter
Chicago Java Users Group ChicagoUSJava Enthusiasts 2579Janine Patterson
Dallas Google Developer Group DallasUSGoogle Devs 2578Jennifer Weingarten McGee
MATH View Algorithm Design (MATHVAD) Palo AltoUSAlglorist Coders 2546Suresh B Velagapudi
Paris.py (Python, Django & friends) ParisFRPythonistas 2529Sylvain Zimmer
Warszawa Java User Group (Warszawa JUG) WarsawPLWJUGowicze 2522Tomasz Szymanski
JAVA Colombo ColomboLKMembers 2506WSO2
Software Development Community (SDC) NapervilleUSTech Professionals 2480TokenPals
Polish Java User Group KrakówPLMembers 2477Konrad Malawski
Java User Group - Hyderabad HyderabadINJava Nizams 2475Stephen Chin
Serverless San FranciscoUSMembers 2475Serverless User Group
Toronto Java Users Group TorontoCAMembers 2445Adib Saikali
Carbon Five LA Hack Nights Santa MonicaUSHackers 2406Carbon Five
GDG Jakarta JakartaIDDevelopers 2403Putri Izzati
Developing with Data in San Francisco San FranciscoUSDevelopers 2398Scott Mitchell
ExpertTalks Manchester ManchesterGBExperts 2387Jon Dickinson
Moscow Big Systems/Big Data MoscowRUMassive Scale Developers 2351Alexey Ragozin
Atlanta Java Users Group AtlantaUSDevelopers 2351Vincent Mayers
Jozi-JUG JohannesburgZAJVM Developers with Passion 2335Michael Williams
The Ahmedabad Java Meetup Group AhmedabadINCronies 2319Amit Raj Tyagi
Realm San FranciscoUSDevelopers 2290S. Nayyer
DCJUG/Data Driven DC RestonUSMembers 2275Gray Herter
TLV - Android Academy Tel Aviv-YafoILAndroiders 2252Yonatan Levin
Technology Job Seekers Greater Boston BostonUSProfessionals 2239Maureen
Polyglot Languages & Runtimes (Java, JVM, nodejs, Swift...) BangaloreINMembers 2231Rajeev Palanki
Skyway Software Symposium MinneapolisUStech folk 2229Kevin Behrens
life michael tel aviv Tel Aviv-YafoILMembers 2208Haim Michael
Paris Cassandra Meetup - by DataStax ParisFRCassandra Rebels 2190DataStax
Bristech BristolGBBristechnologists 2180James Phillpotts
IT Development Café AmsterdamNLDevelopment Heroes 2179Luca Prak
Ch'ti JUG LilleFRCh'ti juggers 2165Team Ch'ti JUG
GDG Baghdad BaghdadIQMembers 2159Safa Salwan
Duchess France Meetup ParisFRDuchess 2084Duchess France
The Iron Yard - Charleston CharlestonUSMembers 2077Tom Wilson
Women Who Code LA Culver CityUSCoders 2067Women Who Code
GDG Kraków KrakówPLMembers 2048Mateusz Herych
Scala at the Sea SeattleUSMembers 2046Nick Elsberry
Melbourne Java & JVM Users Group MelbourneAU0xCAFEBABEs 2038Kon Soulianidis
Singapore Spring User Group SingaporeSGSpring Developers 2000Sergiu Bodiu
Denver Open Source Users Group DenverUSMembers 1985Mike Barker
Wroclaw JUG Meetup WroclawPLDevelopers 1977Mateusz Glapinski
MadridJUG MadridESjaveros 1977Carlos Sierra
Poland CodiLime Tech Talk WarsawPLLimes 1957HR
Android Nigeria Community LagosNGMembers 1957None
Algorithms and Data Structures New YorkUSDevelopers 1954Maggie
Today Software Magazine Cluj-NapocaROdevelopers 1951Ovidiu Matan
Learning Android Development San FranciscoUSMembers 1950Nathan Esquenazi
Madison Area Software Developers Meetup Group MadisonUSSoftware Developers 1934Paul Miller
DataKRK (formerly Cracow Hadoop User Group) KrakówPLMembers 1926Przemek Maciolek
javaBin Oslo OsloNOMembers 1919Dervis M
DevTalk LA Los AngelesUSMembers 1906Ken Dempster
GeoDev Meetup Group - Northeast New YorkUSMembers 1905Amy Niessen
Tech Talks at Meetup New YorkUSTech Talks @ Meetup 1903Evan Estola
Perú Java User Group LimaPEMembers 1903Eddú Meléndez
Warsaw Hadoop User Group (Poland) WarsawPLWHUGers 1898Adam Kawa
Greetings, Hackternooners ! Santa ClaraUSHackternooners 1890Rob
Google Developers Group Oslo (GDG) OsloNOMembers 1881Thomas Bassetto
Philippine Android Developers Community ManilaPHDroids 1876Evan Dale Aromin
Montréal JUG MontréalCAMembers 1860Montreal JUG
SoundCloud Tech Meetups - Berlin BerlinDEpeople 1857Sarah Briddon
Silicon Valley Cloud Foundry User Group Palo AltoUSCloud Founders 1855Dave Nielsen
Ciklum Ukraine/Belarus knowledge sharing community KyivUAIT geeks 1847Julia
Android Meetup Bogotá BogotáCODesarrolladores Android 1843Santiago Carrillo
Graph Database - San Francisco San FranciscoUSGraphistas 1837Neo4j
Java User Group Łódź ŁódźPLJugowicze 1836Stowarzyszenie JUG Łódź
Tech Talks Israel Tel Aviv-YafoILMembers 1832Daniel Schwartzer
OWASP Northern Virginia Chapter RestonUSMembers 1830Michael McCabe
Bot Builder Meetup - Bangalore BangaloreINTechies/Founders 1825Malay Warankar
The Iron Yard - Indianapolis IndianapolisUSLearners 1825Aaron Kopel
St. Louis Java User's Group Saint LouisUSMembers 1820Bruce Alspaugh
Android254 NairobiKEdroiders 1788Priest Tamre
Austin Programmer Community AustinUSProgrammers & Developers 1786George Pazdral
All Things Web Tech ChicagoUSTech Leaders 1784brian rodriguez
Geeknight Coimbatore CoimbatoreINMembers 1781Selvakumar Natesan
Women Who Code Manila ManilaPHAwesome Women Coders 1772Women Who Code
Women Who Code Bangalore BangaloreINCoders 1761Women Who Code
ThinkJava Kharkiv KharkivUAУчастники 1756NIX Solutions ltd
Detroit Java User Group DetroitUSJUG Members 1750Matt Schuetze
Women Who Code Chicago ChicagoUSCoders 1749Women Who Code
Montana Programmers BozemanUSMontana Programmers 1746Wes
Clean Code Alliance Tel Aviv-YafoILClean Coders 1737Itzik Saban
DomCode UtrechtNLCoders 1732Lucas van Lierop
London Mobile & Web App Development Meetup LondonGBMembers 1732Raj
Azure Israel Tel Aviv-YafoILMembers 1720Israeli Azure
New York City Real-Time Stream Processing User Group New YorkUSStorm Chasers 1719Eugene Dvorkin
London Code Dojo LondonGBDevelopers 1718@sleepyfox
Java Usergroup Berlin-Brandenburg BerlinDEJavaianer 1700Joerg M.
Los Angeles Android Developers + Mobile Developer Meetup Beverly HillsUSAndroid Developers 1697Dakotta
Guadalajara Java User Group ZapopanMXJava Programmers 1671Eryx Paredes
Pune Java User Group PuneINJava Developers 1670Saager Mhatre
Java Vienna ViennaATMembers 1654Dominik Dorn
Learn to code in 2018 LagosNGMembers 1652Adedipo Olagbegi
Coded in Braam JohannesburgZATechies 1643Niel de Wet
GDG Philadelphia PhiladelphiaUSAllies 1631John Mahoney
ExpertTalks Portugal LisbonPTExperts 1628Nuno Marques
LeedsTechHub LeedsGBMembers 1623Lawrence Dudley
Trójmiasto Java User Group GdanskPLJava Geeks 1619Kuba Marchwicki
Freelance Talks : Les Apéros Freelances & Tips ParisFRFreelances 1616FreelanceRepublik
San Francisco Bay Area Azure San FranciscoUSAzure Developers 1614Robin Shahan
SF - Data Engineering San FranciscoUSData Engineers 1607Galvanize
Phx-Starters: Phoenix Startup Technology Round Table PhoenixUSPhx-Starters 1594Michael Fitzgerald
Quant Finance TorontoCAMembers 1588Bryan Downing
Couchbase Silicon Valley Mountain ViewUSMembers 1588Couchbase
OpenHack Austin AustinUSOpenHackers 1587Joshua Johnson
Seattle Data Engineering SeattleUSData Engineers 1587Galvanize
Orange County Java User Group (OCJUG) IrvineUSMembers 1574Philip Yurchuk
Bay Area Women in Technology Meetup San FranciscoUSTechnology Lovers 1572Rachel Katz