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

Name City Country Focus Members Contact Name
Virtual Java User Group LondonGBvJUGers 15876Simon Maple
Google Developer Group Silicon Valley Mountain ViewUSGoogle Developers 13332Peter Mooshammer
Tech in Motion Events: San Francisco San FranciscoUSTechnologists 13054Mandy Ivy
The New York City Java Meetup Group New YorkUSJava enthusiasts 11567Dario Laverde
Tech in Motion: Washington DC ArlingtonUSTechnologists 11217Mandy Walker
Developers-BR São PauloBRDevs 10512Valerio Ferreira
Fullstack Developers Israel Tel Aviv-YafoILFullstackers 10285Lior Kanfi
New York Software Engineers (NYSE) New YorkUSSoftware Engineers 8660Michael Latulippe
Tech in Motion: Silicon Valley San JoseUSTechnologists 8415Mandy
Tech in Motion: Los Angeles Los AngelesUSTechnologists 7508Mandy
Tech in Motion: Philadelphia PhiladelphiaUSTechnologists 7232Mandy
Tech In Motion: Orange County IrvineUSTechnologists 7034Mandy Walker
The Agile Roundabout LondonGBAgile enthusiasts 6940Phill Bateman
VanDev: Vancouver's Software Developers Network VancouverCASoftware Industry Professionals 6878Cliff Hammerschmidt
LJC - London Java Community LondonGBJava Developers 6818Barry Cranford
San Francisco & Silicon Valley Android Developers Meetup Palo AltoUSAndroid Developers & Users 6811David Cao SVE.io
Istanbul Coders IstanbulTRCoder 6554Selim Öber
Google Developer Group San Francisco @sf_gdg San FranciscoUSGoogle Developers 6553James Cha
New York MongoDB User Group New YorkUSMembers 6489MongoDB
Silicon Valley Java User Group Mountain ViewUSJava Developers 6429Kevin Nilson
Hacker Hours New YorkUSHaxors 6371Aidan Feldman
The San Francisco Java User Group San FranciscoUSJava Developers 5979Pieter Humphrey
London App Brewery LondonGBApp Makers 5613Philipp Muellauer
Skills Matter - X Matters Series - Free Developer Events LondonGBsoftware craftspeople 5481Melita Cawdell - Skills Matter
Bangalore JAVA User Group (BangaloreJUG) BangaloreINjuggie'z 5462Ranganath.S
GDG Ahmedabad AhmedabadINTechnology Explorers 5294Paresh Mayani
Tech Interviews and Competitive Programming Mountain ViewUSSolution Finders 5098Jonathan R.
ThoughtWorks Geek Night - NCR DelhiINMembers 5017Avinash Chugh
Bay Area Hackathons San FranciscoUSHackers 4966Raj
RIoT RaleighUSRIoTers 4922Tom Snyder
¿Por qué aprender a Programar? BogotáCONuevos Programadores 4829Cesar
Find a Tech Job LondonGBCareer Networkers 4598Samantha hepburn
The San Francisco Android GDG San FranciscoUSAndroid Developers 4503Ty Smith
Arte e Programação São PauloBRPessoas 4417Alexandre Villares
New York Android Developers New YorkUSMembers 4414Kevin Galligan
London Software Craftsmanship Community LondonGBSoftware Crafters 4412Sandro Mancuso
GDG Cambridge, Boston and Metro, Google Developer Group CambridgeUSMembers 4339Steven Max Patterson
AI Users Group UK LondonGBAI Specialists 4220Dan Harvey
Amazon Web Services - Virginia HerndonUSMembers 4213Kelly
Hyderabad Hadoop, Data science, AWS and IOT Group HyderabadINMembers 4198Arun Sirimalla
Neo4j - London User Group LondonGBPeople 4180Neo4j
allegro Tech WarsawPLTechs 4171Janek P.
Berlin Hack and Tell BerlinDEHackers 4115Keith Corwin
GOTO Nights CPH CopenhagenDKMembers 4059Tine Grarup
Bay Area Android Developer San FranciscoUSDevelopers 3999Stephan Branczyk
The Future is made in Javascript Tel Aviv-YafoILJavascripters 3981Yaron Biton
Paris Android User Group ParisFRMembres 3933Stephane Guerin
Java Meetup - Bangalore BangaloreINDukes 3927Ganesh Samarthyam
GDG Paris - Google Developer Group ParisFRParticipants 3911Alain Regnier
Melbourne Web Developers MelbourneAUDevs 3797Emma
Bogotá JVM Meetup BogotáCOdevelopers and entrepreneurs 3790Julian Espinel
Developer User Group JohannesburgZASoftware Developers 3597Robert MacLean
Seattle Android Developers SeattleUSAndroid Developers 3575Chris Pick
AWS Seattle | Official Events SeattleUSMembers 3560Ross Barich
Boston Software Engineers BostonUSSoftware Engineers 3555Michael Latulippe
Women Who Code Berlin BerlinDEMembers 3541Women Who Code
By ThoughtWorks tech-talk series MelbourneAUMembers 3525Karen Dumville
ny-scala New YorkUSScala Types 3458Dustin Whitney
Bay Area Full Stack Mountain ViewUSnvirters 3435Vikram Dham
London Scala Users' Group LondonGBEnthusiasts 3425Andy Hicks
GOTO Nights - London, UK LondonGBFriends 3423Maria Wennestam
São Paulo Java Meetup São PauloBRJaveiros 3416Bruno Marinho
Code Oregon PortlandUSStudents 3413Jenny W
Stacja IT Warszawa WarsawPLMembers 3411Maria Nowakowska
Delhi MongoDB User Group DelhiINMembers 3391MongoDB
GDG Tel Aviv Tel Aviv-YafoILGDGers 3359James Lebowitz
Istanbul Java User Group (JUG) - @jug_istanbul IstanbulTRMembers 3328Altug Bilgin Altintas
Istanbul Spring Meetup IstanbulTRMembers 3293Erdem Gunay
Tech Next PuneINTech Enthusiasts 3216Mukund Rajamannar
Utah Java Users Group Salt Lake CityUSTechnologists 3195Jason Porter
NYC Tech Talks New YorkUSNYC Techies 3172Greg Whalin
Denver Java Users Group DenverUSJava Developers 3107Matt Raible
Android In Asia SingaporeSGAndroid Developers & Users 3099Khang Toh
Silicon Valley Mobile Developer meetup Palo AltoUSdevs 3057Suyash Joshi
The Boston Java Meetup Group CambridgeUSJava Developers 3039Kaj Kandler
eBay Europe Technology #ebaytechtalk BerlinDEeBay Hackers 3030Katja Sommer
WSO2 - Sri Lanka ColomboLKMembers 3009WSO2
Mexico City JVM Group México CityMXDiscípulos JVM 2967JVM MX Organizer
Memphis Technology User Groups MemphisUSTechies 2966Bryan Robinson
Tech Talk DC ArlingtonUSPolyglots 2941Doguhan Uluca
Java User Group Hamburg HamburgDEMitglieder 2928Daniel Galán y Martins
IT w Warszawie WarsawPLMembers 2924Jadex
NYC Codecademy Group New YorkUSCoders 2913Codecademy Staff
Cleveland Big Data and Hadoop User Group ClevelandUSSuper Hadoopers 2865Doug Meil
GOTO Nights Amsterdam AmsterdamNLGotos 2835Adele Carpenter
SoCal Node.js Los AngelesUSNoders 2784David Aktary
Boston Apache Spark User Group CambridgeUSSpahk Enthusiasts 2751Joseph Kambourakis
Java.IL - the Israeli Java Community Tel Aviv-YafoILDevelopers 2738Tomer Gabel
3Pillar Product Innovation Group NoidaINProduct Innovators 2734Kapil Dhiman
Bay Area Mobile Mountain ViewUSBammers 2696A. Burkett
London Dev Community LondonGBDeveloper, Manager, Architect 2669David Gimelle
Chicago Java Users Group ChicagoUSJava Enthusiasts 2662Janine Patterson
Dallas Google Developer Group DallasUSGoogle Devs 2658Jennifer Weingarten McGee
Java User Group Argentina Buenos AiresARJavitos 2632Ramiro Rinaudo
Serverless San FranciscoUSMembers 2623Serverless User Group
DC Droids - DC Android Developers, Designers, Enthusiast WashingtonUSAndroid Fans 2614Prasanna Perera
Java User Group - Hyderabad HyderabadINJava Nizams 2610Stephen Chin
Warszawa Java User Group (Warszawa JUG) WarsawPLWJUGowicze 2583Tomasz Szymanski
Polish Java User Group KrakówPLMembers 2583Konrad Malawski
ExpertTalks Manchester ManchesterGBExperts 2573Jon Dickinson
Paris.py (Python, Django & friends) ParisFRPythonistas 2544Sylvain Zimmer
MATH View Algorithm Design (MATHVAD) Palo AltoUSAlglorist Coders 2532Suresh B Velagapudi
JAVA Colombo ColomboLKMembers 2519WSO2
Toronto Java Users Group TorontoCAMembers 2507Adib Saikali
GDG Jakarta JakartaIDDevelopers 2506Putri Izzati
Developing with Data in San Francisco San FranciscoUSDevelopers 2449Scott Mitchell
Moscow Big Systems/Big Data MoscowRUMassive Scale Developers 2426Alexey Ragozin
Atlanta Java Users Group AtlantaUSDevelopers 2424Vincent Mayers
Carbon Five LA Hack Nights Santa MonicaUSHackers 2421Carbon Five
Jozi-JUG JohannesburgZAJVM Developers with Passion 2404Michael Williams
IT Development Café AmsterdamNLDevelopment Heroes 2363Luca Prak
life michael tel aviv Tel Aviv-YafoILMembers 2352Haim Michael
GDG Baghdad BaghdadIQMembers 2350Safa Salwan
GDG Kraków KrakówPLMembers 2347Mateusz Herych
Polyglot Languages & Runtimes (Java, JVM, nodejs, Swift...) BangaloreINMembers 2345Rajeev Palanki
The Ahmedabad Java Meetup Group AhmedabadINCronies 2318Amit Raj Tyagi
DCJUG/Data Driven DC RestonUSMembers 2303Gray Herter
Realm San FranciscoUSDevelopers 2275S. Nayyer
TLV - Android Academy Tel Aviv-YafoILAndroiders 2272Yonatan Levin
Ch'ti JUG LilleFRCh'ti juggers 2265Team Ch'ti JUG
Technology Job Seekers Greater Boston BostonUSProfessionals 2262Maureen
Jforum Stockholm StockholmSEMembers 2262Mattias Karlsson
Bristech BristolGBBristechnologists 2238James Phillpotts
Learn to code in 2018 LagosNGMembers 2231Adedipo Olagbegi
Skyway Software Symposium MinneapolisUStech folk 2226Kevin Behrens
Paris Cassandra Meetup - by DataStax ParisFRCassandra Rebels 2223DataStax
Scala at the Sea SeattleUSMembers 2149Nick Elsberry
Women Who Code LA Culver CityUSCoders 2112Women Who Code
The Iron Yard - Charleston CharlestonUSMembers 2112Tom Wilson
Duchess France Meetup ParisFRDuchess 2097Duchess France
Melbourne Java & JVM Users Group MelbourneAU0xCAFEBABEs 2087Kon Soulianidis
Wroclaw JUG Meetup WroclawPLDevelopers 2082Mateusz Glapinski
Today Software Magazine Cluj-NapocaROdevelopers 2081Ovidiu Matan
MadridJUG MadridESjaveros 2069Carlos Sierra
Denver Open Source Users Group DenverUSMembers 2052Mike Barker
Poland CodiLime Tech Talk WarsawPLLimes 2050HR
Android254 NairobiKEdroiders 2047Priest Tamre
Android Nigeria Community LagosNGMembers 2030Peter Ekene Eze
Singapore Spring User Group SingaporeSGSpring Developers 2015Sergiu Bodiu
Philippine Android Developers Community ManilaPHDroids 1998Evan Dale Aromin
Perú Java User Group LimaPEMembers 1992Eddú Meléndez
Madison Area Software Developers Meetup Group MadisonUSSoftware Developers 1989Paul Miller
Java User Group Łódź ŁódźPLJugowicze 1964Stowarzyszenie JUG Łódź
DataKRK (formerly Cracow Hadoop User Group) KrakówPLMembers 1961Przemek Maciolek
Geeknight Coimbatore CoimbatoreINMembers 1961Selvakumar Natesan
DevTalk LA Los AngelesUSMembers 1960Ken Dempster
Algorithms and Data Structures New YorkUSDevelopers 1959Maggie
javaBin Oslo OsloNOMembers 1957Dervis M
Learning Android Development San FranciscoUSMembers 1957Nathan Esquenazi
Montréal JUG MontréalCAMembers 1957Montreal JUG
GDG Jalandhar JalandharINCommunity Member 1947Nitika Rajput
Greetings, Hackternooners ! Santa ClaraUSHackternooners 1943Rob
Warsaw Hadoop User Group (Poland) WarsawPLWHUGers 1943Adam Kawa
Google Developers Group Oslo (GDG) OsloNOMembers 1936Thomas Bassetto
GeoDev Meetup Group - Northeast WashingtonUSMembers 1935Amy Niessen
Women Who Code Manila ManilaPHAwesome Women Coders 1929Women Who Code
Ciklum Ukraine/Belarus knowledge sharing community KyivUAIT geeks 1924Julia
Tech Talks at Meetup New YorkUSTech Talks @ Meetup 1912Evan Estola
OWASP Northern Virginia Chapter RestonUSMembers 1899Michael McCabe
Tech Talks Israel Tel Aviv-YafoILMembers 1895Daniel Schwartzer
London Mobile & Web App Development Meetup LondonGBMembers 1891Raj
SoundCloud Tech Meetups - Berlin BerlinDEpeople 1871Sarah Briddon
Women Who Code Bangalore BangaloreINCoders 1871Women Who Code
St. Louis Java User's Group Saint LouisUSMembers 1863Bruce Alspaugh
Silicon Valley Cloud Foundry User Group Palo AltoUSCloud Founders 1856Dave Nielsen
Java Usergroup Berlin-Brandenburg BerlinDEJavaianer 1845Joerg M.
Android Meetup Bogotá BogotáCODesarrolladores Android 1843Santiago Carrillo
Graph Database - San Francisco San FranciscoUSGraphistas 1832Neo4j
Bot Builder Meetup - Bangalore BangaloreINTechies/Founders 1823Malay Warankar
Detroit Java User Group DetroitUSJUG Members 1821Matt Schuetze
Austin Programmer Community AustinUSProgrammers & Developers 1821George Pazdral
The Iron Yard - Indianapolis IndianapolisUSLearners 1807Aaron Kopel
ThinkJava Kharkiv KharkivUAУчастники 1800NIX Solutions ltd
Pune Spring Developers PuneINSpringDevs 1796Imteyaz Ahmad
Women Who Code Chicago ChicagoUSCoders 1784Women Who Code
DomCode UtrechtNLCoders 1781Lucas van Lierop
All Things Web Tech ChicagoUSTech Leaders 1779brian rodriguez
Azure Israel Tel Aviv-YafoILMembers 1772Israeli Azure
Guadalajara Java User Group ZapopanMXJava Programmers 1760Eryx Paredes
Montana Programmers BozemanUSMontana Programmers 1753Wes
Clean Code Alliance Tel Aviv-YafoILClean Coders 1753Itzik Saban
Java Vienna ViennaATMembers 1734Dominik Dorn
Trójmiasto Java User Group GdanskPLJava Geeks 1721Kuba Marchwicki
London Code Dojo LondonGBDevelopers 1716@sleepyfox
New York City Real-Time Stream Processing User Group New YorkUSStorm Chasers 1711Eugene Dvorkin
Los Angeles Android Developers + Mobile Developer Meetup Beverly HillsUSAndroid Developers 1694Dakotta
Pune Java User Group PuneINJava Developers 1685Saager Mhatre
Bash! BelfastGBMembers 1680Tara Simpson
GDG Philadelphia PhiladelphiaUSAllies 1660John Mahoney
Phx-Starters: Phoenix Startup Technology Round Table PhoenixUSPhx-Starters 1655Michael Fitzgerald
Cleveland #learntocode Group ClevelandUStechies 1647Tech Elevator
Coded in Braam JohannesburgZATechies 1644Niel de Wet
Tech nights in Medellín MedellínCOMembers 1636Sebastian Miranda
Couchbase Silicon Valley Mountain ViewUSMembers 1633Couchbase
ExpertTalks Portugal LisbonPTExperts 1632Nuno Marques
Freelance Talks : Les Apéros Freelances & Tips ParisFRFreelances 1631FreelanceRepublik
Seattle Data Engineering SeattleUSData Engineers 1627Galvanize
LeedsTechHub LeedsGBMembers 1626Lawrence Dudley
Javaforum Göteborg GöteborgSEJava coders 1624Tomas Trolltoft
San Francisco Bay Area Azure San FranciscoUSAzure Developers 1623Robin Shahan