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

Name City Country Focus Members Contact Name
Hackers and Founders Mountain ViewUSHackers/Founders 15418Jonathan Nelson
Tech in Motion Events: San Francisco San FranciscoUSTechnologists 13054Mandy Ivy
Code Crew - Learn to Code! New YorkUSSwabbies 11620Jamal
Fullstack Developers Israel Tel Aviv-YafoILFullstackers 10285Lior Kanfi
106 Miles Palo AltoUS106ers 8653Adam
Le Wagon São Paulo - Coding Bootcamp São PauloBRcoders 7467Mathieu Le Roux
she codes(tlv); Tel Aviv-YafoILCoders 7415Ruth Polachek
Tech In Motion: Orange County IrvineUSTechnologists 7034Mandy Walker
Tech Talks @ Pivotal Labs Sydney SydneyAUMembers 6590Amjad Sidqi
New York MongoDB User Group New YorkUSMembers 6489MongoDB
Hacker Hours New YorkUSHaxors 6371Aidan Feldman
Geekfest ChicagoUSGeeks 6063Geekfest
The San Francisco Ruby Meetup Group San FranciscoUSRuby enthusiasts 6037Bosco So
Hack Reactor: Learn to Code San FranciscoUSEngineers 5941Tyler Lambe
Swift Language User Group (San Francisco) San FranciscoUSSwifters 5306S. Nayyer
NYC.rb New YorkUSRubyists 5179Rashaun Snuggs Stovall
Ironhack Barcelona - UX Design & Tech School BarcelonaESIronhackers 5139Charlotte Bottemanne
Learn to Code San Francisco San FranciscoUSMembers 5084Galvanize
I am Happy Project - Ni Dilli, Indian Ni DilliINHappy People 5070I am Happy Project
StarsConf meetup SantiagoCLSlackers 5019Jorge Alberto Rodríguez Suárez
Bay Area Hackathons San FranciscoUSHackers 4966Raj
Code for Boston CambridgeUSCivic Innovators 4922Code for America Brigade
Find a Tech Job LondonGBCareer Networkers 4598Samantha hepburn
San Francisco Ruby on Rails Group San FranciscoUSMembers 4555Cassandra Salisbury
ChicagoRuby ChicagoUSRubyists 4518Nicole Carpenter
Chicago Women Developers ChicagoUSAmazing People 4314Melissa Pierce
NYC on Rails New YorkUSRuby developers 4165Avi Flombaum
Dev Bootcamp NYC Events and Workshops New YorkUSDevs 4084Eric David Benari
Hack && Tell New YorkUSHackers 3922Danielle Sucher
Pittsburgh Code & Supply PittsburghUSMembers 3913Code & Supply
Real World React San FranciscoUSDevelopers 3911Benjamin Dunphy
Women Who Code Boston BostonUSCoders 3886Women Who Code
Melbourne Web Developers MelbourneAUDevs 3797Emma
Toronto Hack and Tell TorontoCAHackers 3758Alex E
Data Wranglers DC WashingtonUSData Wranglers 3673Data Community DC
Developer User Group JohannesburgZASoftware Developers 3597Robert MacLean
Ruby and Rails Melbourne MelbourneAURubyists 3542reinteractive Meetups
NYC CRYPTO Meetup New YorkUSCryptechies 3537Jenn
Women Who Code Austin AustinUSCoders 3528Women Who Code
The Opportunity Hub - Atlanta AtlantaUSMembers 3484Rodney Sampson
Learn Code in Atlanta (Study Groups) AtlantaUSLearners 3474Ivy Rueb
LA Web/Mobile Software Entrepreneurs Santa MonicaUSFuture Billionaires 3459Craig FS
Delhi MongoDB User Group DelhiINMembers 3391MongoDB
Learn to Code Austin AustinUSAspiring Coders 3206Galvanize
San Francisco MongoDB User Group San FranciscoUSMongoDB Fans 3180MongoDB
Community Hack Night Los AngelesUSMembers 3180Dubie
NYC Tech Talks New YorkUSNYC Techies 3172Greg Whalin
CodeLearn Hong Kong Hong KongHKLearners & Thinkers 3041Zak Burki
Memphis Technology User Groups MemphisUSTechies 2966Bryan Robinson
DC Ruby Users Group WashingtonUSRuby enthusiasts 2956Geoff Harcourt
Tech Talk DC ArlingtonUSPolyglots 2941Doguhan Uluca
Tech Talent South - Atlanta AtlantaUSMembers 2918Tech Talent South
Le Wagon Berlin - Coding Bootcamp BerlinDEMembers 2868Philipp von Hammerstein
Paris.rb ParisFRRubyistes 2864Thibaut Assus
Amsterdam Python Meetup Group AmsterdamNLPythonistas 2833Byte
Toronto Ruby Brigade TorontoCARubyists 2771Luke Reeves
Learn to Code Colorado DenverUSMembers 2753Galvanize
Silicon Valley Ruby Meetup San JoseUSRubyists 2700Bala Paranj
Silicon Valley Ruby on Rails Palo AltoUSRuby on Rails Engineers 2590Amit Gadhia
Vancouver Ruby Meetup Group VancouverCARuby Developers 2575Philippe Creux
Le Wagon Lisbon - Coding Bootcamp LisbonPTapprentices 2571Shannon Graybill
Tinderbox San FranciscoUSmembers 2551Carbon Five
Singapore Ruby Group SingaporeSGRubyists 2540Winston Teo
San Francisco Creative Coders San FranciscoUSTechnologists 2539Christopher Marsh
Marketing for Non-Marketers San Francisco San FranciscoUSDigital Marketing Geeks 2516Eva from Product School
Atlanta Ruby Meetup Group AtlantaUSRuby programmers 2514Riaz
Anyone Can Learn To Code Chicago ChicagoUSCoders 2496Jay Wengrow
Pune Ruby Users Group PuneINRubyists 2459Gautam Rege
Developing with Data in San Francisco San FranciscoUSDevelopers 2449Scott Mitchell
Carbon Five LA Hack Nights Santa MonicaUSHackers 2421Carbon Five
Chilango Dev México CityMXDevs 2375Eric Northam
Dev Dialogue New YorkUSDevelopers 2369Matthew Jording
Technology Job Seekers Greater Boston BostonUSProfessionals 2262Maureen
Learn to Code at the Denver Library DenverUSMembers 2250Alex Baker
Ruby on Rails Oceania Sydney SydneyAURubyists 2244reinteractive Meetups
Ruby Perú LimaPERubyistas 2238Gustavo
Techstarters Vancouver VancouverCATechstarters 2237Sarah Foot
Madrid MongoDB User Group MadridESMembers 2232MongoDB
Women Who Code Delhi DelhiINWomen Who Code-rs 2199Women Who Code
Dubai DevNights DubaiAEMembers 2197Seb Dietzel
Chennai.rb Ruby User Group ChennaiINRubyists 2127Steve Robinson
Women Who Code LA Culver CityUSCoders 2112Women Who Code
The Iron Yard - Charleston CharlestonUSMembers 2112Tom Wilson
The Iron Yard Austin AustinUSProgrammers and Designers 2107Justin Herrick
The Los Angeles Ruby/Rails Meetup Group Los AngelesUSRuby programmers 2084Claudio B.
Le Wagon Amsterdam - Coding Bootcamp AmsterdamNLWagoners 2042Anne Collet
Code Till Dawn Saint LouisUSCoders 2016Nicholas Diaz
Denver Hack Nite DenverUSHacks 1976Josh Robinson
Azure Community Singapore (ACS) SingaporeSGAzure Community Members 1973Riza Marhaban
Paris MongoDB User Group ParisFRMembers 1963MongoDB
Geeknight Coimbatore CoimbatoreINMembers 1961Selvakumar Natesan
GDG Jalandhar JalandharINCommunity Member 1947Nitika Rajput
Greetings, Hackternooners ! Santa ClaraUSHackternooners 1943Rob
New York Ruby on Rails New YorkUSRails Engineers 1936Michael Latulippe
Women Who Code Manila ManilaPHAwesome Women Coders 1929Women Who Code
LA Web Application Developers Meetup Los AngelesUSWeb Software Engineers 1919will jessup
Hacker News Chicago Meetup ChicagoUSHackers 1913Eric L
Hire Ruby on Rails Developers San FranciscoUSdevs and companies 1882Eric Siegfried
Bangalore Ruby Users Group BangaloreINRubyists 1877Swanand Pagnis
SoundCloud Tech Meetups - Berlin BerlinDEpeople 1871Sarah Briddon
Berlin Startup Culture (BSC) BerlinDEMembers 1854George Papa
Le Wagon Tokyo - Coding Bootcamp TokyoJPWagoners 1845Paul Gaumer
The East Bay Ruby Meetup Group BerkeleyUSRuby programmers 1826Bala Paranj
Austin Programmer Community AustinUSProgrammers & Developers 1821George Pazdral
Dublin DevOps Meetup DublinIEFriends 1816Cassiano Aquino
Nairuby NairobiKEMembers 1789Christian Reuterwall
SF Code & Coffee San FranciscoUSMembers 1789Dylan
DomCode UtrechtNLCoders 1781Lucas van Lierop
The Seattle Ruby on Rails Developers Meetup Group SeattleUSRailers 1769Bill Harding
Montana Programmers BozemanUSMontana Programmers 1753Wes
Dev Paraná MaringáBRDesenvolvedores 1719Fernando Fabricio dos Santos
London Code Dojo LondonGBDevelopers 1716@sleepyfox
GolangNYC New YorkUSGophers 1714Gray Herter
The Triangle Ruby Brigade (Triangle.rb) RaleighUSRubyists 1713Brandon Mathis
Charlotte Devs CharlotteUSDevs 1704Alyssa Lemon
N-Languages New YorkUSN-langers 1682EVIE B0RTHWICK
Turing Community Events DenverUSMembers 1674Jeff Casimir
Web Innovations- Houston HoustonUSMembers 1655Chen Sun of WebAndNet.com
Fog City Ruby Meetup San FranciscoUSRubyists 1647Stella Cotton
Coded in Braam JohannesburgZATechies 1644Niel de Wet
Tech nights in Medellín MedellínCOMembers 1636Sebastian Miranda
Pittsburgh Agile (@PittAgile | #PittAgile) PittsburghUSAgilistas 1633Jon R. Stahl
LeedsTechHub LeedsGBMembers 1626Lawrence Dudley
Learn Code in LA Los AngelesUSLearners 1624Ivy Rueb
Quality Assurance New YorkUSMembers 1608Anthony Long
Amsterdam.rb AmsterdamNLRubyists 1605Rayta van Rijswijk
Ottawa Ruby – we <3 programming OttawaCARuby Ninjas 1603Michael Prendergast
Boston Ruby on Rails Meetup Group BostonUSRails-ists 1599MG
Ruby Business (UK) LondonGBrubyists 1595Jairo Diaz
Lehi Developers User Group LehiUSDuggers 1595Jeffrey Walter
Delhi NCR Ruby Meetup Group DelhiINRubyists 1585Prabhat Gupta
OpenHack Austin AustinUSOpenHackers 1578Joshua Johnson
Women Who Code Mexico City México CityMXCoders 1575Women Who Code
SF Front-End Developers: Experience Engineering San FranciscoUSExperience Engineers 1567Ahmad Ansari
Rails Taiwan TaipeiTWrubyists 1565xdite
Open Source Hong Kong Hong KongHKMembers 1559Sammy Fung
Handy Tech Talks New YorkUSMembers 1550Eric David Benari
Holberton School San FranciscoUSSeahorses 1543Julien Barbier
Le Wagon Bordeaux - Coding Bootcamp BordeauxFRApprentis 1521Bertrand
Ruby Hacknight - London LondonGBRubyists 1502Jairo Diaz
Le Wagon Barcelona - Coding Bootcamp BarcelonaESfuture coders 1499Gus De Vita
Hacks/Hackers Atlanta AtlantaUSMembers 1473Hacks/Hackers
Codewords Pune PuneINCraftsmen 1469Karan Rai
Tech Talent South - Columbus ColumbusUSTech Tribe Members 1457Tech Talent South
Porto Codes PortoPTVariables 1450Ricardo Mendes
Learn to Code - for Complete Beginners in San Francisco. San FranciscoUSCoders In Training 1439Andy Tiffany
RubyOn - Ruby On Rails - São PauloBRRubistas 1434Leandro Afonso
NYC Ruby Women New YorkUSRubyists 1420Chrys Wu
Flatiron School Seattle Coding Community SeattleUSLearners 1402Emily Doyle
NewHaven.IO New HavenUSTech Minded People 1396Zach Morek
Jeddah Software Developers JiddahSADevelopers 1393Aaron Q. Johnson
YulDev MontréalCADev 1389Daniel LeBlanc
Girls Coding Club HoustonUSCoders 1379Amanda Shih
Cleveland Agile Group (#CleAG) ClevelandUSAgilistas 1373Jon R. Stahl
TOKYO Rails Meetup TokyoJPMembers 1367Leszek
The Brisbane Ruby and Rails BrisbaneAURuby/Rails developers 1360Nigel
Polyglot.LA Los AngelesUSpolyglots 1358Polyglot.LA Organizer Team
Python in Korea SeoulKRGeeks 1355Eric Kim Hoik
Nola Hack Night New OrleansUSHackers 1352Ben Lavender
Paris Ruby Workshop ParisFRRubyistes 1345Victor Mours
B'more on Rails BaltimoreUSRubyists 1343Chris Strom
NYC Apache Lucene/Solr Meetup New YorkUSLuceners 1327Grant Ingersoll
Advance in your career - Udacity London Meetup LondonGBUdacians 1325Andy Parker
Stockholm Ruby StockholmSERubyists 1317Martin Svalin
BASE (Birmingham Alabama Software Enthusiasts) BirminghamUSSoftware Enthusiasts 1310David Lormor
Enspiral Dev Academy Wellington WellingtonNZFriends of EDA 1310Enspiral Dev Academy
The jQuery Boston Meetup Group BostonUSMembers 1298Alessandra Rosenberg
Denver.rb DenverUSrubyists 1296Jason Waldrip
Ruby Ireland DublinIERuby Irelanders 1294Declan
Developers Day powered by kariera.gr AthensGRFellows 1292kariera.gr
The Sacramento Ruby Meetup SacramentoUSRubyists 1285Christopher Haupt
WebApp Builders - Fullstack Projects (LA Eastside) GlendaleUSWebApp-Builders 1279Kobi
Krakow Ruby Users Group (KRUG) KrakówPLRuby enthusiasts 1277Sebastian Bobrowski
ThoughtWorks Belo Horizonte Coding Dojos Belo HorizonteBRCoders 1276Adriano Lisboa
Graduate Developer Community LondonGBDevelopers 1262Barry Cranford
Medellín.rb MedellínCORubyists 1258Oscar Rendón
Boulder Ruby Group BoulderUSRubyists 1256Marty Haught
Landing Meetups LisbonPTMembers 1256Landing.jobs
Arlington Ruby ArlingtonUSRubyists 1254Jim Gay
Alchemy Code Lab PortlandUSAlchemists 1239Marty Nelson
Le Wagon Rio de Janeiro - Coding Bootcamp Rio de JaneiroBRCoders 1237Fernando Americano
Orange County Ruby Users Group (OCRuby) IrvineUSRocking Rubyists 1230Forrest Chang
SFBay Apache Lucene/Solr Meetup San MateoUSLuceners 1229Alea Abed
Code Fellows Seattle Meetup SeattleUSMembers 1222Code Fellows
Montreal.rb MontréalCARubyists 1215Sophie Déziel
All Things API: Denver DenverUSAPI Aficionados 1198Monica Peotter
Full Stack Talks CarlsbadUSDesigners & Developers 1196Jeff Berg
Ruby Nuby™ New YorkUSNubies and Rubyists 1178Malcolm Arnold
Los Angeles Hack Night Los AngelesUSHackers 1177Lance Lakey
SD Ruby (Ruby on Rails Enthusiasts) La JollaUSRubyists 1176Patrick Crowley
Le Wagon Lille - Coding Bootcamp LilleFRApprentis 1175François-Xavier Abraham
Philly.rb PhiladelphiaUSRubyists 1166Ernesto Tagwerker
[MumbaiRB] Mumbai Ruby Meetup MumbaiINRubyist 1154Bilal Budhani
Bitnami Sevilla SevillaESbitcoders 1142Beltran
Ruby Project Night NYC New YorkUSRubyists 1141Eric Collins
Full Stack PDX PortlandUSEntrepreneurs and Engineers 1129Chris Hough
Miami Ruby Brigade MiamiUSRubyists 1122Bryce Kerley
Craft Meetup BudapestHUCraftsman 1104Gabriella Mihaly
Philippine Ruby Users Group ManilaPHRubyists 1099Ruby Organizer
Tecnología Digital MonterreyMXprofesionistas 1087arnulfo perez