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

Name City Country Focus Members Contact Name
Hackers and Founders San JoseUSHackers/Founders 15411Jonathan Nelson
Tech in Motion Events: San Francisco San FranciscoUSTechnologists 13130Mandy Ivy
Code Crew - Learn to Code! New YorkUSSwabbies 11571Jamal
Fullstack Developers Israel Tel Aviv-YafoILFullstackers 11085Lior Kanfi
106 Miles Palo AltoUS106ers 8754Adam
Le Wagon São Paulo - Coding Bootcamp São PauloBRcoders 8387Mathieu Le Roux
she codes(tlv); Tel Aviv-YafoILCoders 7470Ruth Polachek
Tech In Motion: Orange County IrvineUSTechnologists 7437Mandy Walker
Hacker Hours New YorkUSHaxors 6816Aidan Feldman
Tech Talks @ Pivotal Labs Sydney SydneyAUMembers 6553Amjad Sidqi
New York MongoDB User Group New YorkUSMembers 6529MongoDB
Geekfest ChicagoUSGeeks 6132Geekfest
The San Francisco Ruby Meetup Group San FranciscoUSRuby enthusiasts 5993Bosco So
Hack Reactor: Learn to Code San FranciscoUSEngineers 5932Tyler Lambe
Ironhack Barcelona - UX Design & Tech School BarcelonaESIronhackers 5702Eva Peris
Swift Language User Group (San Francisco) San FranciscoUSSwifters 5375Jean-Pierre Simard
Code for Boston CambridgeUSCivic Innovators 5253Code for America Brigade
NYC.rb New YorkUSRubyists 5223Rashaun Snuggs Stovall
StarsConf meetup SantiagoCLSlackers 5182Jorge Alberto Rodríguez Suárez
Learn to Code San Francisco San FranciscoUSMembers 5171Galvanize
I am Happy Project - Ni Dilli, Indian Ni DilliINHappy People 5100I am Happy Project
Bay Area Hackathons San FranciscoUSHackers 4945Raj
Find a Tech Job LondonGBCareer Networkers 4676Samantha hepburn
ChicagoRuby ChicagoUSRubyists 4586Nicole Carpenter
San Francisco Ruby on Rails Group San FranciscoUSMembers 4539Ken Fromm
Chicago Women Developers ChicagoUSAmazing People 4524Melissa Pierce
Real World React San FranciscoUSDevelopers 4350Benjamin Dunphy
Women Who Code Boston BostonUSCoders 4286Women Who Code
NYC on Rails New YorkUSRuby developers 4142Avi Flombaum
Pittsburgh Code & Supply PittsburghUSMembers 4096Code & Supply
Dev Bootcamp NYC Events and Workshops New YorkUSDevs 4079Eric David Benari
Learn Code in Atlanta (Study Groups) AtlantaUSLearners 4068Ivy Rueb
Developer User Group JohannesburgZASoftware Developers 3968Robert MacLean
Toronto Hack and Tell TorontoCAHackers 3939Alex E
Hack && Tell New YorkUSHackers 3893Danielle Sucher
Melbourne Web Developers MelbourneAUDevs 3798Emma
Women Who Code Austin AustinUSCoders 3761Women Who Code
Ruby and Rails Melbourne MelbourneAURubyists 3737reinteractive Meetups
Data Wranglers DC WashingtonUSData Wranglers 3689Data Community DC
Delhi MongoDB User Group DelhiINMembers 3614MongoDB
LA Tech and Business Innovators Santa MonicaUSInnovators 3567Craig FS
Learn to Code Austin AustinUSAspiring Coders 3556Galvanize
The Opportunity Hub - Atlanta AtlantaUSMembers 3518Rodney Sampson
Community Hack Night Los AngelesUSMembers 3440Dubie
Le Wagon Berlin - Coding Bootcamp BerlinDEMembers 3440Philipp von Hammerstein
Tech Talent South - Atlanta AtlantaUSMembers 3185Tech Talent South
San Francisco MongoDB User Group San FranciscoUSMongoDB Fans 3174MongoDB
Memphis Technology User Groups MemphisUSTechies 3170Bryan Robinson
NYC Tech Talks New YorkUSNYC Techies 3154Greg Whalin
Tech Talk DC ArlingtonUSPolyglots 3070Doguhan Uluca
CodeLearn Hong Kong Hong KongHKLearners & Thinkers 3059Zak Burki
Amsterdam Python Meetup Group AmsterdamNLPythonistas 3039Byte
DC Ruby Users Group WashingtonUSRuby enthusiasts 3028Geoff Harcourt
Paris.rb ParisFRRubyistes 2960Thibaut Assus
Le Wagon Lisbon - Coding Bootcamp LisbonPTapprentices 2956Shannon Graybill
Learn to Code Colorado DenverUSMembers 2938Galvanize
Toronto Ruby Brigade TorontoCARubyists 2755Luke Reeves
Carbon Five SF Talk Nights San FranciscoUSmembers 2717Carbon Five
Silicon Valley Ruby Meetup San JoseUSRubyists 2688Bala Paranj
Vancouver Ruby Meetup Group VancouverCARuby Developers 2643Philippe Creux
Pune Ruby Users Group PuneINRubyists 2582Gautam Rege
Singapore Ruby Group SingaporeSGRubyists 2581Winston Teo
Silicon Valley Ruby on Rails Palo AltoUSRuby on Rails Engineers 2569Amit Gadhia
Atlanta Ruby Meetup Group AtlantaUSRuby programmers 2565Riaz
Le Wagon Amsterdam - Coding Bootcamp AmsterdamNLWagoners 2524Anne Collet
San Francisco Creative Coders San FranciscoUSTechnologists 2517Christopher Marsh
Marketing for Non-Marketers San Francisco San FranciscoUSDigital Marketing Geeks 2475Eva from Product School
Anyone Can Learn To Code Chicago ChicagoUSCoders 2470Jay Wengrow
Geeknight Coimbatore CoimbatoreINMembers 2454Selvakumar Natesan
Developing with Data in San Francisco San FranciscoUSDevelopers 2450Scott Mitchell
Carbon Five LA Hack Nights Santa MonicaUSHackers 2416Carbon Five
Dev Dialogue New YorkUSDevelopers 2400Matthew Jording
Women Who Code Delhi DelhiINWomen Who Code-rs 2391Women Who Code
Women Who Code LA Culver CityUSCoders 2364Women Who Code
Chilango Dev México CityMXDevs 2360Eric Northam
Learn to Code at the Denver Library DenverUSMembers 2351Alex Baker
Ruby on Rails Oceania Sydney SydneyAURubyists 2346reinteractive Meetups
Boston Data Science Career #ODSC BostonUSProfessionals 2292Sheamus
Ruby Perú LimaPERubyistas 2285Able
Madrid MongoDB User Group MadridESMembers 2281MongoDB
SF Code & Coffee San FranciscoUSMembers 2268Dylan
Techstarters Vancouver VancouverCATechstarters 2231Sarah Foot
GDG Jalandhar JalandharINCommunity Member 2203Nitika Rajput
Code till Dawn Saint LouisUSCoders 2198Nicholas Diaz
Dubai DevNights DubaiAEMembers 2180Seb Dietzel
Women Who Code Manila ManilaPHAwesome Women Coders 2149Women Who Code
Chennai.rb Ruby User Group ChennaiINRubyists 2129Steve Robinson
The Iron Yard - Charleston CharlestonUSMembers 2111Tom Wilson
Azure Community Singapore (ACS) SingaporeSGAzure Community Members 2088Riza Marhaban
Denver Hack Nite DenverUSHacks 2085Josh Robinson
The Los Angeles Ruby/Rails Meetup Group Los AngelesUSRuby programmers 2081Claudio B.
Le Wagon Tokyo - Coding Bootcamp TokyoJPWagoners 2081Paul Gaumer
Charlotte Devs CharlotteUSDevs 2081Alyssa Lemon
The Iron Yard Austin AustinUSProgrammers and Designers 2067Justin Herrick
Nairuby NairobiKEMembers 2059Christian Reuterwall
Dev Paraná MaringáBRDesenvolvedores 2047Fernando Fabricio dos Santos
Paris MongoDB User Group ParisFRMembers 2035MongoDB
Holberton School San FranciscoUSSeahorses 2010Julien Barbier
EBANX Meetups CuritibaBRMembers 1985EBANX Meetups
Austin Programmer Community AustinUSProgrammers & Developers 1958George Pazdral
Bangalore Ruby Users Group BangaloreINRubyists 1948Swanand Pagnis
Greetings, SVBBDev - BlackBerry App Developers! Santa ClaraUSSVBBDev - BB App Developers 1945Ping Bartley
New York Ruby on Rails New YorkUSRails Engineers 1938Michael Latulippe
LA Web Application Developers Meetup Los AngelesUSWeb Software Engineers 1919will jessup
DomCode UtrechtNLCoders 1916Lucas van Lierop
Learn Code in LA Los AngelesUSLearners 1911Ivy Rueb
Hacker News Chicago Meetup ChicagoUSHackers 1902Eric L
Hire Ruby on Rails Developers San FranciscoUSdevs and companies 1890Eric Siegfried
GolangNYC New YorkUSGophers 1871Gray Herter
Women Who Code Mexico City México CityMXCoders 1865Women Who Code
SoundCloud Tech Meetups - Berlin BerlinDEpeople 1863Vincent Garrigues
Berlin Startup Culture (BSC) BerlinDEMembers 1860George Papa
Dublin DevOps Meetup DublinIEFriends 1834Cassiano Aquino
The East Bay Ruby Meetup Group BerkeleyUSRuby programmers 1826Bala Paranj
Tech Talent South - Columbus ColumbusUSTech Tribe Members 1800Tech Talent South
Montana Programmers KalispellUSMontana Programmers 1784Wes
The Seattle Ruby on Rails Developers Meetup Group SeattleUSRailers 1768Bill Harding
Lehi Developers User Group LehiUSDuggers 1760Jeffrey Walter
The Triangle Ruby Brigade (Triangle.rb) RaleighUSRubyists 1725Brandon Mathis
Turing Community Events DenverUSMembers 1716Jeff Casimir
Pittsburgh Agile (@PittAgile | #PittAgile) PittsburghUSAgilistas 1712Jon R. Stahl
London Code Dojo LondonGBDevelopers 1704@sleepyfox
Amsterdam.rb AmsterdamNLRubyists 1701Rayta van Rijswijk
Leeds Digital LeedsGBMembers 1700Natasha Sayce-Zelem
Fog City Ruby Meetup San FranciscoUSRubyists 1678Stella Cotton
N-Languages New YorkUSN-langers 1673EVIE B0RTHWICK
Austin Software Engineers & App Developers AustinUSSoftware Engineers/Developers 1673Chris Requena
Web Innovations- Houston HoustonUSMembers 1672Chen Sun of WebAndNet.com
Tech nights in Medellín MedellínCOMembers 1671Sebastian Miranda
Ottawa Ruby – we <3 programming OttawaCARuby Ninjas 1664Michael Prendergast
Le Wagon Barcelona - Coding Bootcamp BarcelonaESfuture coders 1656Gus De Vita
Open Source Hong Kong Hong KongHKMembers 1654Sammy Fung
Coded in Braam JohannesburgZATechies 1639Niel de Wet
Porto Codes PortoPTVariables 1626Ricardo Mendes
Landing Meetups LisbonPTMembers 1624Landing.jobs
Quality Assurance BrooklynUSMembers 1610Anthony
Delhi NCR Ruby Meetup Group DelhiINRubyists 1594Prabhat Gupta
Boston Ruby on Rails Meetup Group BostonUSRails-ists 1592MG
Rails Taiwan TaipeiTWrubyists 1582xdite
Ruby Business (UK) LondonGBrubyists 1575Jairo Diaz
Le Wagon Bordeaux - Coding Bootcamp BordeauxFRApprentis 1572Bertrand
Ruby Hacknight - London LondonGBRubyists 1568Jairo Diaz
SF Front-End Developers: Experience Engineering San FranciscoUSExperience Engineers 1566Ahmad Ansari
Learn to Code - for Complete Beginners in San Francisco. San FranciscoUSCoders In Training 1563Andy Tiffany
Girls Coding Club HoustonUSCoders 1558Amanda Shih
Flatiron School Seattle Coding Community SeattleUSLearners 1541Emily Doyle
Handy Tech Talks New YorkUSMembers 1535Eric David Benari
Jeddah Software Developers JiddahSADevelopers 1527Aaron Q. Johnson
Polyglot.LA Los AngelesUSpolyglots 1517Polyglot.LA Organizer Team
Paris Ruby Workshop ParisFRRubyistes 1511Patrice Cadiot
NewHaven.IO New HavenUSTech Minded People 1491Tom Reznick
Developers Day powered by kariera.gr AthensGRFellows 1486kariera.gr
Cleveland Agile Group (#CleAG) ClevelandUSAgilistas 1483Jon R. Stahl
BASE (Birmingham Alabama Software Enthusiasts) BirminghamUSSoftware Enthusiasts 1483David Lormor
The Brisbane Ruby and Rails BrisbaneAURuby/Rails developers 1476Nigel
TOKYO Rails Meetup TokyoJPMembers 1469Leszek
Hacks/Hackers Atlanta AtlantaUSMembers 1466Hacks/Hackers
Codewords Pune PuneINCraftsmen 1466Karan Rai
NYC Ruby Women New YorkUSRubyists 1459Chrys Wu
RubyOn - Ruby On Rails - São PauloBRRubistas 1452Leandro Afonso
Nola Hack Night New OrleansUSHackers 1444Cory Fabre
Junior Developers Singapore SingaporeSGMembers 1414Michael Cheng
YulDev MontréalCADev 1412Daniel LeBlanc
Krakow Ruby Users Group (KRUG) KrakówPLRuby enthusiasts 1366Sebastian Bobrowski
Python in Korea SeoulKRGeeks 1362Eric Kim Hoik
B'more on Rails BaltimoreUSRubyists 1360Chris Strom
Coding For Absolute Beginners - Delhi NCR DelhiINNinjas 1355Progate India
Denver.rb DenverUSrubyists 1353Jason Waldrip
NYC Apache Lucene/Solr Meetup New YorkUSLuceners 1351Grant Ingersoll
Le Wagon Rio de Janeiro - Coding Bootcamp Rio de JaneiroBRCoders 1343Fernando Americano
Advance in your career - Udacity London Meetup LondonGBUdacians 1330Andy Parker
Ruby Ireland DublinIERuby Irelanders 1326Declan
Enspiral Dev Academy Wellington WellingtonNZFriends of Dev Academy 1325Enspiral Dev Academy
Alchemy Code Lab PortlandUSAlchemists 1324Marty Nelson
The Sacramento Ruby Meetup SacramentoUSRubyists 1310Christopher Haupt
Stockholm Ruby StockholmSERubyists 1310Martin Svalin
Medellín.rb MedellínCORubyists 1310Oscar Rendón
Boulder Ruby Group BoulderUSRubyists 1305Marty Haught
Arlington Ruby ArlingtonUSRubyists 1289Jim Gay
ThoughtWorks Belo Horizonte Coding Dojos Belo HorizonteBRCoders 1287Adriano Lisboa
The jQuery Boston Meetup Group BostonUSMembers 1281Alessandra Rosenberg
WebApp Builders - Fullstack Projects (LA Eastside) GlendaleUSWebApp-Builders 1267Kobi
Montreal.rb MontréalCARubyists 1265Sophie Déziel
Graduate Developer Community LondonGBDevelopers 1257Barry Cranford
Women Who Code Tokyo TokyoJPCoders 1256Women Who Code
Orange County Ruby Users Group (OCRuby) IrvineUSRocking Rubyists 1249Forrest Chang
Code Fellows Seattle Meetup SeattleUSMembers 1246Code Fellows
Le Wagon Lille - Coding Bootcamp LilleFRApprentis 1234François-Xavier Abraham
Full Stack PDX PortlandUSEntrepreneurs and Engineers 1226Chris Hough
SFBay Apache Lucene/Solr Meetup San MateoUSLuceners 1225Marcus Alexander Eagan
SD Ruby (Ruby on Rails Enthusiasts) La JollaUSRubyists 1206Patrick Crowley
Le Wagon Melbourne - Coding Bootcamp MelbourneAUCreatives 1200Paal at Le Wagon Coding Bootcamp
All Things API: Denver DenverUSAPI Aficionados 1189Monica Peotter
Full Stack Talks CarlsbadUSDesigners & Developers 1187None
Bitnami Sevilla SevillaESbitcoders 1187Beltran
Philly.rb PhiladelphiaUSRubyists 1179Ernesto Tagwerker
[MumbaiRB] Mumbai Ruby Meetup MumbaiINRubyist 1176Bilal Budhani
Los Angeles Hack Night Los AngelesUSHackers 1168Lance Lakey
Ruby Nuby™ New YorkUSNubies and Rubyists 1164Malcolm Arnold
Bogotá Ruby BogotáCODesarrolladores Ruby 1149Nathaly Villamor