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

Name City Country Focus Members Contact Name
Hackers and Founders San JoseUSHackers/Founders 15432Jonathan Nelson
Tech in Motion Events: San Francisco San FranciscoUSTechnologists 13195Mandy Ivy
Code Crew - Learn to Code! New YorkUSSwabbies 11531Jamal
Full Stack Developers Israel Tel Aviv-YafoILFullstackers 11308Lior Kanfi
106 Miles Palo AltoUS106ers 8781Adam
Le Wagon São Paulo - Coding Bootcamp São PauloBRcoders 8604Mathieu Le Roux
Tech In Motion: Orange County IrvineUSTechnologists 7570Mandy Walker
she codes(tlv); Tel Aviv-YafoILCoders 7488Ruth Polachek
Hacker Hours New YorkUSHaxors 6993Aidan Feldman
Tech Talks @ Pivotal Labs Sydney SydneyAUMembers 6539Amjad Sidqi
New York MongoDB User Group New YorkUSMembers 6533MongoDB
Geekfest ChicagoUSGeeks 6101Geekfest
The San Francisco Ruby Meetup Group San FranciscoUSRuby enthusiasts 5998Bosco So
Hack Reactor: Learn to Code San FranciscoUSEngineers 5904Tyler Lambe
Ironhack Barcelona - UX Design & Tech School BarcelonaESIronhackers 5812Eva Peris
Code for Boston CambridgeUSCivic Innovators 5479Code for America Brigade
StarsConf meetup SantiagoCLSlackers 5402Jorge Alberto Rodríguez Suárez
Swift Language User Group (San Francisco) San FranciscoUSSwifters 5393Jean-Pierre Simard
NYC.rb New YorkUSRubyists 5214Rashaun Snuggs Stovall
Learn to Code San Francisco San FranciscoUSMembers 5202Galvanize
I am Happy Project - Ni Dilli, Indian Ni DilliINHappy People 5097I am Happy Project
Bay Area Hackathons San FranciscoUSHackers 4923Raj
Find a Tech Job LondonGBCareer Networkers 4649Samantha hepburn
ChicagoRuby ChicagoUSRubyists 4619Nicole Carpenter
Chicago Women Developers ChicagoUSAmazing People 4609Melissa Pierce
Real World React San FranciscoUSDevelopers 4559Benjamin Dunphy
San Francisco Ruby on Rails Group San FranciscoUSMembers 4525Ken Fromm
Women Who Code Boston BostonUSCoders 4474Women Who Code
Learn Code in Atlanta (Study Groups) AtlantaUSLearners 4330Ivy Rueb
Pittsburgh Code & Supply PittsburghUSMembers 4174Code & Supply
NYC on Rails New YorkUSRuby developers 4114Avi Flombaum
Developer User Group JohannesburgZASoftware Developers 4102Robert MacLean
Toronto Hack and Tell TorontoCAHackers 4100Alex E
Dev Bootcamp NYC Events and Workshops New YorkUSDevs 4066Eric David Benari
Women Who Code Austin AustinUSCoders 3911Women Who Code
Hack && Tell New YorkUSHackers 3891Danielle Sucher
Delhi MongoDB User Group DelhiINMembers 3824MongoDB
Ruby and Rails Melbourne MelbourneAURubyists 3822reinteractive Meetups
Melbourne Web Developers MelbourneAUDevs 3804Emma
Data Wranglers DC WashingtonUSData Wranglers 3679Data Community DC
Le Wagon Berlin - Coding Bootcamp BerlinDEMembers 3653Philipp von Hammerstein
Learn to Code Austin AustinUSAspiring Coders 3647Galvanize
LA Tech and Business Innovators Santa MonicaUSInnovators 3614Christopher Hammond
Community Hack Night Los AngelesUSMembers 3565Dubie
The Opportunity Hub - Atlanta AtlantaUSMembers 3538Rodney Sampson
Tech Talent South - Atlanta AtlantaUSMembers 3313Tech Talent South
Memphis Technology User Groups MemphisUSTechies 3244Bryan Robinson
San Francisco MongoDB User Group San FranciscoUSMongoDB Fans 3167MongoDB
NYC Tech Talks New YorkUSNYC Techies 3145Greg Whalin
Tech Talk DC ArlingtonUSPolyglots 3122Doguhan Uluca
Amsterdam Python Meetup Group AmsterdamNLPythonistas 3109Byte
Le Wagon Lisbon - Coding Bootcamp LisbonPTapprentices 3107Shannon Graybill
Learn to Code Colorado DenverUSMembers 3072Galvanize
DC Ruby Users Group WashingtonUSRuby enthusiasts 3055Geoff Harcourt
CodeLearn Hong Kong Hong KongHKLearners & Thinkers 3050Zak Burki
Paris.rb ParisFRRubyistes 2993Thibaut Assus
Toronto Ruby Brigade TorontoCARubyists 2757Luke Reeves
Carbon Five SF Talk Nights San FranciscoUSmembers 2738Carbon Five
Dev Paraná MaringáBRDesenvolvedores 2711Fernando Fabricio dos Santos
Silicon Valley Ruby Meetup San JoseUSRubyists 2690Bala Paranj
Vancouver Ruby Meetup Group VancouverCARuby Developers 2642Philippe Creux
Geeknight Coimbatore CoimbatoreINMembers 2638Selvakumar Natesan
Le Wagon Amsterdam - Coding Bootcamp AmsterdamNLWagoners 2628Anne Collet
Pune Ruby Users Group PuneINRubyists 2627Gautam Rege
Singapore Ruby Group SingaporeSGRubyists 2599Winston Teo
Atlanta Ruby Meetup Group AtlantaUSRuby programmers 2593Riaz
Silicon Valley Ruby on Rails Palo AltoUSRuby on Rails Engineers 2557Amit Gadhia
San Francisco Creative Coders San FranciscoUSTechnologists 2504Christopher Marsh
Marketing for Non-Marketers San Francisco San FranciscoUSDigital Marketing Geeks 2475Eva from Product School
Anyone Can Learn To Code Chicago ChicagoUSCoders 2461Jay Wengrow
SF Code & Coffee San FranciscoUSMembers 2460Dylan
Dev Dialogue New YorkUSDevelopers 2454Matthew Jording
Developing with Data in San Francisco San FranciscoUSDevelopers 2450Scott Mitchell
Women Who Code Delhi DelhiINWomen Who Code-rs 2444Women Who Code
Women Who Code LA Culver CityUSCoders 2443Women Who Code
Carbon Five LA Hack Nights Santa MonicaUSHackers 2400Carbon Five
Ruby on Rails Oceania Sydney SydneyAURubyists 2391reinteractive Meetups
Learn to Code at the Denver Library DenverUSMembers 2386Alex Baker
Chilango Dev México CityMXDevs 2362Eric Northam
Ruby Perú LimaPERubyistas 2336Able
Boston Data Science Career #ODSC BostonUSProfessionals 2305Sheamus
Madrid MongoDB User Group MadridESMembers 2300MongoDB
Code till Dawn Saint LouisUSCoders 2280Nicholas Diaz
Women Who Code Manila ManilaPHAwesome Women Coders 2237Women Who Code
Charlotte Devs CharlotteUSDevs 2236Alyssa Lemon
Techstarters Vancouver VancouverCATechstarters 2222Sarah Foot
EBANX Meetups CuritibaBRMembers 2218EBANX Meetups
Nairuby NairobiKEMembers 2206Christian Reuterwall
Le Wagon Tokyo - Coding Bootcamp TokyoJPWagoners 2191Paul Gaumer
Dubai DevNights DubaiAEMembers 2178Seb Dietzel
Azure Community Singapore (ACS) SingaporeSGAzure Community Members 2133Riza Marhaban
Chennai.rb Ruby User Group ChennaiINRubyists 2128Steve Robinson
Denver Hack Nite DenverUSHacks 2119Josh Robinson
Holberton School San FranciscoUSSeahorses 2117Julien Barbier
The Iron Yard - Charleston CharlestonUSMembers 2100Tom Wilson
Women Who Code Mexico City México CityMXCoders 2084Women Who Code
The Los Angeles Ruby/Rails Meetup Group Los AngelesUSRuby programmers 2077Claudio B.
The Iron Yard Austin AustinUSProgrammers and Designers 2056Justin Herrick
Learn Code in LA Los AngelesUSLearners 2047Ivy Rueb
Paris MongoDB User Group ParisFRMembers 2034MongoDB
Bangalore Ruby Users Group BangaloreINRubyists 2033Swanand Pagnis
Austin Developer Community AustinUSProgrammers & Developers 1984George Pazdral
DomCode UtrechtNLCoders 1975Lucas van Lierop
Greetings, SVBBDev - BlackBerry App Developers! Santa ClaraUSSVBBDev - BB App Developers 1940Ping Bartley
Dublin DevOps Meetup DublinIEFriends 1933Horatiu Muresan
New York Ruby on Rails New YorkUSRails Engineers 1931Michael Latulippe
GolangNYC New YorkUSGophers 1921Gray Herter
LA Web Application Developers Meetup Los AngelesUSWeb Software Engineers 1913will jessup
Hacker News Chicago Meetup ChicagoUSHackers 1888Eric L
Hire Ruby on Rails Developers San FranciscoUSdevs and companies 1877Eric Siegfried
Berlin Startup Culture (BSC) BerlinDEMembers 1864George Papa
SoundCloud Tech Meetups - Berlin BerlinDEpeople 1853Vincent Garrigues
Lehi Developers User Group LehiUSDuggers 1842Jeffrey Walter
The East Bay Ruby Meetup Group BerkeleyUSRuby programmers 1825Bala Paranj
Montana Programmers BozemanUSMontana Programmers 1790Wes
The Seattle Ruby on Rails Developers Meetup Group SeattleUSRailers 1774Bill Harding
Pittsburgh Agile (@PittAgile | #PittAgile) PittsburghUSAgilistas 1770Jon R. Stahl
Le Wagon Barcelona - Coding Bootcamp BarcelonaESfuture coders 1754Gus De Vita
Austin Software Engineers & App Developers AustinUSSoftware Engineers/Developers 1741Chris Requena
Landing Meetups LisbonPTMembers 1734Landing.jobs
Leeds Digital LeedsGBMembers 1733Natasha Sayce-Zelem
The Triangle Ruby Brigade (Triangle.rb) RaleighUSRubyists 1730Brandon Mathis
Turing Community Events DenverUSMembers 1729Jeff Casimir
Open Source Hong Kong Hong KongHKMembers 1729Sammy Fung
Porto Codes PortoPTVariables 1717Ricardo Mendes
Junior Developers Singapore SingaporeSGMembers 1712Michael Cheng
Amsterdam.rb AmsterdamNLRubyists 1707Rayta van Rijswijk
N-Languages New YorkUSN-langers 1706EVIE B0RTHWICK
London Code Dojo LondonGBDevelopers 1700@sleepyfox
Ottawa Ruby – we <3 programming OttawaCARuby Ninjas 1684Michael Prendergast
Web Innovations- Houston HoustonUSMembers 1677Chen Sun of WebAndNet.com
Tech nights in Medellín MedellínCOMembers 1676Sebastian Miranda
Fog City Ruby (Closed) San FranciscoUSRubyists 1659Stella Cotton
Girls Coding Club HoustonUSCoders 1647Amanda Shih
Flatiron School Seattle Coding Community SeattleUSLearners 1647Katharine Lucic
Coded in Braam JohannesburgZATechies 1629Niel de Wet
Quality Assurance BrooklynUSMembers 1614Anthony
Jeddah Software Developers JiddahSADevelopers 1602Aaron Q. Johnson
Le Wagon Bordeaux - Coding Bootcamp BordeauxFRApprentis 1601Bertrand
Learn to Code - for Complete Beginners in San Francisco. San FranciscoUSCoders In Training 1592Andy Tiffany
Delhi NCR Ruby Meetup Group DelhiINRubyists 1590Prabhat Gupta
Rails Taiwan TaipeiTWrubyists 1589xdite
SF Front-End Developers: Experience Engineering San FranciscoUSExperience Engineers 1571Ahmad Ansari
Ruby Hacknight - London LondonGBRubyists 1570Jairo Diaz
Ruby Business (UK) LondonGBrubyists 1567Jairo Diaz
Paris Ruby Workshop ParisFRRubyistes 1565Patrice Cadiot
Polyglot.LA Los AngelesUSpolyglots 1562Polyglot.LA Organizer Team
BASE (Birmingham Alabama Software Enthusiasts) BirminghamUSSoftware Enthusiasts 1541David Lormor
Andes Tech Talks New YorkUSTechnologist 1539Will Aroc
NewHaven.IO New HavenUSTech Minded People 1537Tom Reznick
Developers Day powered by kariera.gr AthensGRFellows 1533kariera.gr
Cleveland Agile Group (#CleAG) ClevelandUSAgilistas 1525Jon R. Stahl
TOKYO Rails Meetup TokyoJPMembers 1515Leszek
The Brisbane Ruby and Rails BrisbaneAURuby/Rails developers 1492Nigel
NYC Ruby Women New YorkUSRubyists 1485Chrys Wu
Nola Hack Night New OrleansUSHackers 1476Cory Fabre
Le Wagon Rio de Janeiro - Coding Bootcamp Rio de JaneiroBRCoders 1471Fernando Americano
Hacks/Hackers Atlanta AtlantaUSMembers 1469Hacks/Hackers
RubyOn - Ruby On Rails - São PauloBRRubistas 1461Leandro Afonso
Codewords Pune PuneINCraftsmen 1461Karan Rai
YulDev MontréalCADev 1451Daniel LeBlanc
Women Who Code Tokyo TokyoJPCoders 1405Women Who Code
Le Wagon TLV - Coding Bootcamp Tel Aviv-YafoILMembers 1398Rabea Bader
Krakow Ruby Users Group (KRUG) KrakówPLRuby enthusiasts 1397Sebastian Bobrowski
Golang SkyNet Global . (Golang Global) SeoulKRGeeks 1391Eric Kim Hoik
NYC Apache Lucene/Solr Meetup New YorkUSLuceners 1388Grant Ingersoll
Enspiral Dev Academy Wellington WellingtonNZFriends of Dev Academy 1375Enspiral Dev Academy
Denver.rb DenverUSrubyists 1370Jason Waldrip
Coding For Absolute Beginners - Delhi NCR DelhiINNinjas 1370Progate India
B'more on Rails BaltimoreUSRubyists 1360Chris Strom
Alchemy Code Lab PortlandUSAlchemists 1347Marty Nelson
The Sacramento Ruby Meetup SacramentoUSRubyists 1333Christopher Haupt
Ruby Ireland DublinIERuby Irelanders 1333Declan
Advance in your career - Udacity London Meetup LondonGBUdacians 1329Andy Parker
Medellín.rb MedellínCORubyists 1315Oscar Rendón
Arlington Ruby ArlingtonUSRubyists 1312Jim Gay
Stockholm Ruby StockholmSERubyists 1310Martin Svalin
Boulder Ruby Group BoulderUSRubyists 1306Marty Haught
ThoughtWorks Belo Horizonte Coding Dojos Belo HorizonteBRCoders 1289Adriano Lisboa
Montreal.rb MontréalCARubyists 1275Sophie Déziel
WebApp Builders - Fullstack Projects (LA Eastside) GlendaleUSWebApp-Builders 1273Kobi
The jQuery Boston Meetup Group BostonUSMembers 1272Alessandra Rosenberg
Full Stack PDX PortlandUSEntrepreneurs and Engineers 1268Chris Hough
Le Wagon Lille - Coding Bootcamp LilleFRApprentis 1264François-Xavier Abraham
Code Fellows Seattle Meetup SeattleUSMembers 1261Code Fellows
Graduate Developer Community LondonGBDevelopers 1258Barry Cranford
Orange County Ruby Users Group (OCRuby) IrvineUSRocking Rubyists 1257Forrest Chang
Le Wagon Melbourne - Coding Bootcamp MelbourneAUCreatives 1236Paal at Le Wagon Coding Bootcamp
SFBay Apache Lucene/Solr Meetup San MateoUSLuceners 1223Marcus Alexander Eagan
SD Ruby (Ruby on Rails Enthusiasts) La JollaUSRubyists 1213Patrick Crowley
Bitnami Sevilla SevillaESbitcoders 1198Beltran
LEARN academy San DiegoUSLEARNers 1195Chelsea Kaufman
Full Stack Talks CarlsbadUSDesigners & Developers 1185Michael Roberts Jr
Philly.rb PhiladelphiaUSRubyists 1185Ernesto Tagwerker
All Things API: Denver DenverUSAPI Aficionados 1184None
[MumbaiRB] Mumbai Ruby Meetup MumbaiINRubyist 1184Bilal Budhani
Craft Meetup BudapestHUCraftsman 1170Gabriella Mihaly
IT 3city GdanskPLMembers 1167Jadex
Bogotá Ruby BogotáCODesarrolladores Ruby 1166Nathaly Villamor
Ruby Nuby™ New YorkUSNubies and Rubyists 1162Malcolm Arnold