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

Name City Country Focus Members Contact Name
Hackers and Founders Mountain ViewUSHackers/Founders 15358Jonathan Nelson
Tech in Motion Events: San Francisco San FranciscoUSTechnologists 13095Mandy Ivy
Code Crew - Learn to Code! New YorkUSSwabbies 11592Jamal
Fullstack Developers Israel Tel Aviv-YafoILFullstackers 10040Lior Kanfi
106 Miles Palo AltoUS106ers 8586Adam
she codes(tlv); Tel Aviv-YafoILCoders 7384Ruth Polachek
Le Wagon São Paulo - Coding Bootcamp São PauloBRcoders 7089Mathieu Le Roux
Tech In Motion: Orange County IrvineUSTechnologists 6674Mandy Walker
Tech Talks @ Pivotal Labs Sydney SydneyAUMembers 6465Amjad Sidqi
New York MongoDB User Group New YorkUSMembers 6440MongoDB
Hacker Hours New YorkUSHaxors 6173Aidan Feldman
The San Francisco Ruby Meetup Group San FranciscoUSRuby enthusiasts 6065Bosco So
Geekfest ChicagoUSGeeks 6047Geekfest
Hack Reactor: Learn to Code San FranciscoUSEngineers 5930Tyler Lambe
Swift Language User Group (San Francisco) San FranciscoUSSwifters 5251S. Nayyer
NYC.rb New YorkUSRubyists 5177Rashaun Snuggs Stovall
I am Happy Project - Ni Dilli, Indian Ni DilliINHappy People 5030I am Happy Project
Ironhack Barcelona - Tech School BarcelonaESIronhackers 5013Charlotte Bottemanne
Bay Area Hackathons San FranciscoUSHackers 4957Raj
Learn to Code San Francisco San FranciscoUSMembers 4899Galvanize
StarsConf meetup SantiagoCLSlackers 4807Jorge Alberto Rodríguez Suárez
Code for Boston CambridgeUSCivic Innovators 4775Code for America Brigade
San Francisco Ruby on Rails Group San FranciscoUSMembers 4582Cassandra Salisbury
Find a Tech Job LondonGBCareer Networkers 4573Samantha hepburn
ChicagoRuby ChicagoUSRubyists 4482Nicole Carpenter
Chicago Women Developers ChicagoUSAmazing People 4248Melissa Pierce
NYC on Rails New YorkUSRuby developers 4176Avi Flombaum
Dev Bootcamp NYC Events and Workshops New YorkUSDevs 4098Eric David Benari
Hack && Tell New YorkUSHackers 3937Danielle Sucher
Pittsburgh Code & Supply PittsburghUSMembers 3824Code & Supply
Real World React San FranciscoUSDevelopers 3811Benjamin Dunphy
Melbourne Web Developers MelbourneAUDevs 3793Emma
Toronto Hack and Tell TorontoCAHackers 3761Alex E
Data Wranglers DC WashingtonUSData Wranglers 3689Data Community DC
Women Who Code Boston BostonUSCoders 3656Women Who Code
Technology + Business + Design New YorkUSmembers 3635MG
NYC CRYPTO Meetup New YorkUSCryptechies 3488Jenn
The Opportunity Hub - Atlanta AtlantaUSMembers 3448Rodney Sampson
LA Web/Mobile Software Entrepreneurs Santa MonicaUSFuture Billionaires 3436Robert K.
Ruby and Rails Melbourne MelbourneAURubyists 3436reinteractive Meetups
Developer User Group JohannesburgZASoftware Developers 3430Robert MacLean
Women Who Code Austin AustinUSCoders 3404Women Who Code
Delhi MongoDB User Group DelhiINMembers 3315MongoDB
Learn Code in Atlanta (Study Groups) AtlantaUSLearners 3226Ivy Rueb
San Francisco MongoDB User Group San FranciscoUSMongoDB Fans 3192MongoDB
NYC Tech Talks New YorkUSNYC Techies 3183Greg Whalin
Learn to Code Austin AustinUSAspiring Coders 3066Galvanize
Community Hack Night Los AngelesUSMembers 3056Dubie
CodeLearn Hong Kong Hong KongHKLearners & Thinkers 2961Zak Burki
DC Ruby Users Group WashingtonUSRuby enthusiasts 2909Geoff Harcourt
Tech Talent South - Atlanta AtlantaUSMembers 2874Tech Talent South
Memphis Technology User Groups MemphisUSTechies 2869Bryan Robinson
Tech Talk DC ArlingtonUSPolyglots 2829Doguhan Uluca
Paris.rb ParisFRRubyistes 2823Thibaut Assus
Toronto Ruby Brigade TorontoCARubyists 2778Luke Reeves
Amsterdam Python Meetup Group AmsterdamNLPythonistas 2751Byte
Silicon Valley Ruby Meetup San JoseUSRubyists 2698Bala Paranj
Learn to Code Colorado DenverUSMembers 2691Galvanize
Le Wagon Berlin - Coding Bootcamp BerlinDEMembers 2652Philipp von Hammerstein
Silicon Valley Ruby on Rails Palo AltoUSRuby on Rails Engineers 2598Amit Gadhia
Tinderbox San FranciscoUSmembers 2575Carbon Five
Vancouver Ruby Meetup Group VancouverCARuby Developers 2564Philippe Creux
San Francisco Creative Coders San FranciscoUSTechnologists 2556Christopher Marsh
Marketing for Non-Marketers San Francisco San FranciscoUSDigital Marketing Geeks 2549Eva from Product School
Singapore Ruby Group SingaporeSGRubyists 2525Winston Teo
Atlanta Ruby Meetup Group AtlantaUSRuby programmers 2510Riaz
Anyone Can Learn To Code Chicago ChicagoUSCoders 2508Jay Wengrow
Le Wagon Lisbon - Coding Bootcamp LisbonPTapprentices 2480Shannon Graybill
Carbon Five LA Hack Nights Santa MonicaUSHackers 2406Carbon Five
Pune Ruby Users Group PuneINRubyists 2399Gautam Rege
Developing with Data in San Francisco San FranciscoUSDevelopers 2398Scott Mitchell
Chilango Dev México CityMXDevs 2384Eric Northam
NYC Ruby Roundtable New YorkUSRubyists 2348Matthew Jording
Technology Job Seekers Greater Boston BostonUSProfessionals 2239Maureen
Learn to Code at the Denver Library DenverUSMembers 2232Alex Baker
Dubai DevNights DubaiAEMembers 2199Seb Dietzel
Madrid MongoDB User Group MadridESMembers 2193MongoDB
Ruby on Rails Oceania Sydney SydneyAURubyists 2185reinteractive Meetups
Techstarters Vancouver VancouverCATechstarters 2179Sarah Foot
The Iron Yard Austin AustinUSProgrammers and Designers 2133Haythem Hammour
Ruby Perú LimaPERubyistas 2121Gustavo
The Los Angeles Ruby/Rails Meetup Group Los AngelesUSRuby programmers 2083Claudio B.
Chennai.rb Ruby User Group ChennaiINRubyists 2077Steve Robinson
The Iron Yard - Charleston CharlestonUSMembers 2077Tom Wilson
Women Who Code Delhi DelhiINWomen Who Code-rs 2075Women Who Code
Women Who Code LA Culver CityUSCoders 2067Women Who Code
New York Ruby on Rails New YorkUSRails Engineers 1942Michael Latulippe
Denver Hack Nite DenverUSHacks 1940Josh Robinson
Paris MongoDB User Group ParisFRMembers 1933MongoDB
Code Till Dawn Saint LouisUSCoders 1929Nicholas Diaz
LA Web Application Developers Meetup Los AngelesUSWeb Software Engineers 1920will jessup
Hacker News Chicago Meetup ChicagoUSHackers 1917Eric L
Greetings, Hackternooners ! Santa ClaraUSHackternooners 1890Rob
Hire Ruby on Rails Developers San FranciscoUSdevs and companies 1886Eric Siegfried
Azure Community Singapore (ACS) SingaporeSGAzure Community Members 1875Riza Marhaban
SoundCloud Tech Meetups - Berlin BerlinDEpeople 1857Sarah Briddon
Berlin Startup Culture (BSC) BerlinDEMembers 1854George Papa
The East Bay Ruby Meetup Group BerkeleyUSRuby programmers 1836Bala Paranj
Bangalore Ruby Users Group BangaloreINRubyists 1822Swanand Pagnis
Dublin DevOps Meetup DublinIEFriends 1811Cassiano Aquino
Le Wagon Tokyo - Coding Bootcamp TokyoJPWagoners 1810Paul Gaumer
Austin Programmer Community AustinUSProgrammers & Developers 1786George Pazdral
Geeknight Coimbatore CoimbatoreINMembers 1782Selvakumar Natesan
Le Wagon Amsterdam - Coding Bootcamp AmsterdamNLWagoners 1779Anne Collet
Women Who Code Manila ManilaPHAwesome Women Coders 1772Women Who Code
The Seattle Ruby on Rails Developers Meetup Group SeattleUSRailers 1763Bill Harding
Montana Programmers BozemanUSMontana Programmers 1746Wes
DomCode UtrechtNLCoders 1732Lucas van Lierop
London Code Dojo LondonGBDevelopers 1718@sleepyfox
The Triangle Ruby Brigade (Triangle.rb) RaleighUSRubyists 1707Brandon Mathis
N-Languages New YorkUSN-langers 1669EVIE B0RTHWICK
Web Innovations- Houston HoustonUSMembers 1668Chen Sun of WebAndNet.com
Turing Community Events DenverUSMembers 1652Jeff Casimir
Coded in Braam JohannesburgZATechies 1643Niel de Wet
Nairuby NairobiKEMembers 1639Christian Reuterwall
LeedsTechHub LeedsGBMembers 1623Lawrence Dudley
Dev Paraná MaringáBRDesenvolvedores 1614Fernando Fabricio dos Santos
Boston Ruby on Rails Meetup Group BostonUSRails-ists 1611MG
Ruby & Elixir Business (UK) LondonGBrubyists 1605Jairo Diaz
Quality Assurance New YorkUSMembers 1604Anthony Long
Fog City Ruby Meetup San FranciscoUSRubyists 1601Stella Cotton
Pittsburgh Agile (@PittAgile | #PittAgile) PittsburghUSAgilistas 1597Jon R. Stahl
OpenHack Austin AustinUSOpenHackers 1587Joshua Johnson
Delhi NCR Ruby Meetup Group DelhiINRubyists 1582Prabhat Gupta
Ottawa Ruby – we <3 programming OttawaCARuby Ninjas 1568Michael Prendergast
SF Front-End Developers: Experience Engineering San FranciscoUSExperience Engineers 1568Ahmad Ansari
Rails Taiwan TaipeiTWrubyists 1551xdite
SF Code & Coffee San FranciscoUSMembers 1547Dylan
Learn Software Development LondonGBCoders 1545Frank Amankwah
Handy Tech Talks New YorkUSMembers 1536Eric David Benari
Lehi Developers User Group LehiUSDuggers 1520Jeffrey Walter
Charlotte Devs CharlotteUSDevs 1519John Mason
Amsterdam.rb AmsterdamNLRubyists 1514Rayta van Rijswijk
Go Language NYC New YorkUSGophers 1511Gray Herter
Open Source Hong Kong Hong KongHKMembers 1509Sammy Fung
Tech nights in Medellín MedellínCOMembers 1495Sebastian Miranda
NYC Golang New YorkUSGophers 1484Greg Lopez
Ruby Hacknight - London LondonGBRubyists 1482Jairo Diaz
Le Wagon Bordeaux - Coding Bootcamp BordeauxFRApprentis 1476Bertrand
Hacks/Hackers Atlanta AtlantaUSMembers 1474Hacks/Hackers
Codewords Pune PuneINCraftsmen 1468Karan Rai
Learn Code in LA Los AngelesUSLearners 1446Ivy Rueb
Le Wagon Barcelona - Coding Bootcamp BarcelonaESfuture coders 1439Gus De Vita
GDG Jalandhar JalandharINCommunity Member 1434Nitika Rajput
RubyOn - Ruby On Rails - São PauloBRRubistas 1432Leandro Afonso
Women Who Code Mexico City México CityMXCoders 1430Women Who Code
Holberton School San FranciscoUSSeahorses 1408Julien Barbier
NYC Ruby Women New YorkUSRubyists 1396Chrys Wu
Learn to Code - for Complete Beginners in San Francisco. San FranciscoUSCoders In Training 1393Andy Tiffany
YulDev MontréalCADev 1367Daniel LeBlanc
TOKYO Rails Meetup TokyoJPMembers 1362Leszek
Porto Codes PortoPTVariables 1359Ricardo Mendes
NewHaven.IO New HavenUSTech Minded People 1346Zach Morek
Python in Korea SeoulKRGeeks 1346Eric Kim Hoik
Cleveland Agile Group (#CleAG) ClevelandUSAgilistas 1335Jon R. Stahl
B'more on Rails BaltimoreUSRubyists 1333Chris Strom
NYC Apache Lucene/Solr Meetup New YorkUSLuceners 1331Grant Ingersoll
Advance in your career - Udacity London Meetup LondonGBUdacians 1325Andy Parker
Stockholm Ruby StockholmSERubyists 1320Martin Svalin
Jeddah Software Developers JiddahSADevelopers 1316Abdullah Alghamdi
Nola Hack Night New OrleansUSHackers 1315Ben Lavender
The Brisbane Ruby and Rails BrisbaneAURuby/Rails developers 1314Nigel
Tech Talent South - Columbus ColumbusUSTech Tribe Members 1310Tech Talent South
The jQuery Boston Meetup Group BostonUSMembers 1303Alessandra Rosenberg
Girls Coding Club HoustonUSCoders 1294Amanda Shih
Flatiron School Seattle Coding Community SeattleUSLearners 1291Emily Doyle
Denver.rb DenverUSrubyists 1290Jason Waldrip
Developers Day powered by kariera.gr AthensGRFellows 1289kariera.gr
Ruby Ireland DublinIERuby Irelanders 1286Declan
The Sacramento Ruby Meetup SacramentoUSRubyists 1275Christopher Haupt
Enspiral Dev Academy Wellington WellingtonNZFriends of EDA 1275Enspiral Dev Academy
WebApp Builders - WEEKLY - Fullstack Projects (LA Eastside) GlendaleUSWebApp-Builders 1271Kobi
Graduate Developer Community LondonGBDevelopers 1262Barry Cranford
Polyglot.LA Los AngelesUSpolyglots 1255Polyglot.LA Organizer Team
Arlington Ruby ArlingtonUSRubyists 1252Jim Gay
Medellín.rb MedellínCORubyists 1252Oscar Rendón
Boulder Ruby Group BoulderUSRubyists 1250Marty Haught
Krakow Ruby Users Group (KRUG) KrakówPLRuby enthusiasts 1240Sebastian Bobrowski
SFBay Apache Lucene/Solr Meetup San MateoUSLuceners 1227Alea Abed
ThoughtWorks Belo Horizonte Coding Dojos Belo HorizonteBRCoders 1222Adriano Lisboa
Orange County Ruby Users Group (OCRuby) IrvineUSRocking Rubyists 1216Forrest Chang
Paris Ruby Workshop ParisFRRubyistes 1215Victor Mours
BASE (Birmingham Alabama Software Enthusiasts) BirminghamUSSoftware Enthusiasts 1198David Lormor
All Things API: Denver DenverUSAPI Aficionados 1198Monica Peotter
Full Stack Talks CarlsbadUSDesigners & Developers 1196Jeff Berg
Code Fellows Seattle Meetup SeattleUSMembers 1192Code Fellows
Montreal.rb MontréalCARubyists 1186Sophie Déziel
Ruby Nuby™ New YorkUSNubies and Rubyists 1182Malcolm Arnold
Alchemy Code Lab PortlandUSAlchemists 1181Marty Nelson
Los Angeles Hack Night Los AngelesUSHackers 1177Lance Lakey
Creative Organization of Developers with Advanced Learning AhmedabadINProgrammers 1176Shivani Sharma
Philly.rb PhiladelphiaUSRubyists 1163Ernesto Tagwerker
Le Wagon Rio de Janeiro - Coding Bootcamp Rio de JaneiroBRCoders 1163Fernando Americano
SD Ruby (Ruby on Rails Enthusiasts) La JollaUSRubyists 1161Patrick Crowley
Landing Meetups LisbonPTMembers 1161Landing.jobs
Ruby Project Night NYC New YorkUSRubyists 1143Eric Collins
Le Wagon Lille - Coding Bootcamp LilleFRApprentis 1137François-Xavier Abraham
Miami Ruby Brigade MiamiUSRubyists 1123Bryce Kerley
Bitnami Sevilla SevillaESbitcoders 1108Beltran
Craft Meetup BudapestHUCraftsman 1104Gabriella Mihaly