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

Name City Country Focus Members Contact Name
Hackers and Founders Mountain ViewUSHackers/Founders 15385Jonathan Nelson
Tech in Motion Events: San Francisco San FranciscoUSTechnologists 13059Mandy Ivy
Code Crew - Learn to Code! New YorkUSSwabbies 11600Jamal
Fullstack Developers Israel Tel Aviv-YafoILFullstackers 10474Lior Kanfi
106 Miles Palo AltoUS106ers 8681Adam
Le Wagon São Paulo - Coding Bootcamp São PauloBRcoders 7860Mathieu Le Roux
she codes(tlv); Tel Aviv-YafoILCoders 7426Ruth Polachek
Tech In Motion: Orange County IrvineUSTechnologists 7168Mandy Walker
Tech Talks @ Pivotal Labs Sydney SydneyAUMembers 6563Amjad Sidqi
Hacker Hours New YorkUSHaxors 6500Aidan Feldman
New York MongoDB User Group New YorkUSMembers 6488MongoDB
Geekfest ChicagoUSGeeks 6137Geekfest
The San Francisco Ruby Meetup Group San FranciscoUSRuby enthusiasts 6016Bosco So
Hack Reactor: Learn to Code San FranciscoUSEngineers 5942Tyler Lambe
Ironhack Barcelona - UX Design & Tech School BarcelonaESIronhackers 5402Charlotte Bottemanne
Swift Language User Group (San Francisco) San FranciscoUSSwifters 5345S. Nayyer
NYC.rb New YorkUSRubyists 5200Rashaun Snuggs Stovall
StarsConf meetup SantiagoCLSlackers 5141Jorge Alberto Rodríguez Suárez
Learn to Code San Francisco San FranciscoUSMembers 5107Galvanize
I am Happy Project - Ni Dilli, Indian Ni DilliINHappy People 5086I am Happy Project
Code for Boston CambridgeUSCivic Innovators 5004Code for America Brigade
Bay Area Hackathons San FranciscoUSHackers 4961Raj
Find a Tech Job LondonGBCareer Networkers 4624Samantha hepburn
San Francisco Ruby on Rails Group San FranciscoUSMembers 4539Cassandra Salisbury
ChicagoRuby ChicagoUSRubyists 4532Nicole Carpenter
Chicago Women Developers ChicagoUSAmazing People 4357Melissa Pierce
NYC on Rails New YorkUSRuby developers 4163Avi Flombaum
Real World React San FranciscoUSDevelopers 4143Benjamin Dunphy
Dev Bootcamp NYC Events and Workshops New YorkUSDevs 4085Eric David Benari
Women Who Code Boston BostonUSCoders 4003Women Who Code
Pittsburgh Code & Supply PittsburghUSMembers 3957Code & Supply
Hack && Tell New YorkUSHackers 3904Danielle Sucher
Melbourne Web Developers MelbourneAUDevs 3792Emma
Developer User Group JohannesburgZASoftware Developers 3737Robert MacLean
Toronto Hack and Tell TorontoCAHackers 3736Alex E
Data Wranglers DC WashingtonUSData Wranglers 3687Data Community DC
Learn Code in Atlanta (Study Groups) AtlantaUSLearners 3658Ivy Rueb
Ruby and Rails Melbourne MelbourneAURubyists 3626reinteractive Meetups
Women Who Code Austin AustinUSCoders 3593Women Who Code
NYC CRYPTO Meetup New YorkUSCryptechies 3556Jenn
The Opportunity Hub - Atlanta AtlantaUSMembers 3496Rodney Sampson
LA Web/Mobile Software Entrepreneurs Santa MonicaUSFuture Billionaires 3493Craig FS
Delhi MongoDB User Group DelhiINMembers 3396MongoDB
Learn to Code Austin AustinUSAspiring Coders 3299Galvanize
Community Hack Night Los AngelesUSMembers 3276Dubie
San Francisco MongoDB User Group San FranciscoUSMongoDB Fans 3173MongoDB
NYC Tech Talks New YorkUSNYC Techies 3162Greg Whalin
Le Wagon Berlin - Coding Bootcamp BerlinDEMembers 3091Philipp von Hammerstein
CodeLearn Hong Kong Hong KongHKLearners & Thinkers 3059Zak Burki
Memphis Technology User Groups MemphisUSTechies 3024Bryan Robinson
Tech Talk DC ArlingtonUSPolyglots 3000Doguhan Uluca
DC Ruby Users Group WashingtonUSRuby enthusiasts 2978Geoff Harcourt
Tech Talent South - Atlanta AtlantaUSMembers 2945Tech Talent South
Amsterdam Python Meetup Group AmsterdamNLPythonistas 2917Byte
Paris.rb ParisFRRubyistes 2894Thibaut Assus
Learn to Code Colorado DenverUSMembers 2778Galvanize
Toronto Ruby Brigade TorontoCARubyists 2764Luke Reeves
Silicon Valley Ruby Meetup San JoseUSRubyists 2691Bala Paranj
Le Wagon Lisbon - Coding Bootcamp LisbonPTapprentices 2677Shannon Graybill
Vancouver Ruby Meetup Group VancouverCARuby Developers 2598Philippe Creux
Silicon Valley Ruby on Rails Palo AltoUSRuby on Rails Engineers 2579Amit Gadhia
Singapore Ruby Group SingaporeSGRubyists 2575Winston Teo
Carbon Five SF Talk Nights San FranciscoUSmembers 2539Carbon Five
San Francisco Creative Coders San FranciscoUSTechnologists 2531Christopher Marsh
Atlanta Ruby Meetup Group AtlantaUSRuby programmers 2524Riaz
Pune Ruby Users Group PuneINRubyists 2502Gautam Rege
Marketing for Non-Marketers San Francisco San FranciscoUSDigital Marketing Geeks 2499Eva from Product School
Anyone Can Learn To Code Chicago ChicagoUSCoders 2483Jay Wengrow
Developing with Data in San Francisco San FranciscoUSDevelopers 2457Scott Mitchell
Carbon Five LA Hack Nights Santa MonicaUSHackers 2426Carbon Five
Dev Dialogue New YorkUSDevelopers 2383Matthew Jording
Chilango Dev México CityMXDevs 2371Eric Northam
Technology Job Seekers Greater Boston BostonUSProfessionals 2288Maureen
Ruby on Rails Oceania Sydney SydneyAURubyists 2282reinteractive Meetups
Madrid MongoDB User Group MadridESMembers 2275MongoDB
Ruby Perú LimaPERubyistas 2275Gustavo
Learn to Code at the Denver Library DenverUSMembers 2273Alex Baker
Le Wagon Amsterdam - Coding Bootcamp AmsterdamNLWagoners 2254Anne Collet
Techstarters Vancouver VancouverCATechstarters 2249Sarah Foot
Women Who Code Delhi DelhiINWomen Who Code-rs 2243Women Who Code
Dubai DevNights DubaiAEMembers 2193Seb Dietzel
Women Who Code LA Culver CityUSCoders 2186Women Who Code
Geeknight Coimbatore CoimbatoreINMembers 2172Selvakumar Natesan
The Iron Yard - Charleston CharlestonUSMembers 2121Tom Wilson
Chennai.rb Ruby User Group ChennaiINRubyists 2120Steve Robinson
The Los Angeles Ruby/Rails Meetup Group Los AngelesUSRuby programmers 2089Claudio B.
The Iron Yard Austin AustinUSProgrammers and Designers 2087Justin Herrick
Code Till Dawn Saint LouisUSCoders 2070Nicholas Diaz
Azure Community Singapore (ACS) SingaporeSGAzure Community Members 2044Riza Marhaban
Denver Hack Nite DenverUSHacks 2033Josh Robinson
Paris MongoDB User Group ParisFRMembers 2031MongoDB
Women Who Code Manila ManilaPHAwesome Women Coders 2026Women Who Code
GDG Jalandhar JalandharINCommunity Member 2019Nitika Rajput
SF Code & Coffee San FranciscoUSMembers 1953Dylan
New York Ruby on Rails New YorkUSRails Engineers 1945Michael Latulippe
Greetings, SVBBDev - BlackBerry App Developers! Santa ClaraUSSVBBDev - BB App Developers 1943Ping Bartley
LA Web Application Developers Meetup Los AngelesUSWeb Software Engineers 1913will jessup
Bangalore Ruby Users Group BangaloreINRubyists 1913Swanand Pagnis
Nairuby NairobiKEMembers 1913Christian Reuterwall
Austin Programmer Community AustinUSProgrammers & Developers 1907George Pazdral
Hacker News Chicago Meetup ChicagoUSHackers 1903Eric L
Hire Ruby on Rails Developers San FranciscoUSdevs and companies 1886Eric Siegfried
Le Wagon Tokyo - Coding Bootcamp TokyoJPWagoners 1885Paul Gaumer
SoundCloud Tech Meetups - Berlin BerlinDEpeople 1868Vincent Garrigues
Berlin Startup Culture (BSC) BerlinDEMembers 1851George Papa
The East Bay Ruby Meetup Group BerkeleyUSRuby programmers 1826Bala Paranj
DomCode UtrechtNLCoders 1824Lucas van Lierop
Dublin DevOps Meetup DublinIEFriends 1820Cassiano Aquino
Dev Paraná MaringáBRDesenvolvedores 1809Fernando Fabricio dos Santos
Charlotte Devs CharlotteUSDevs 1805Alyssa Lemon
The Seattle Ruby on Rails Developers Meetup Group SeattleUSRailers 1770Bill Harding
GolangNYC New YorkUSGophers 1765Gray Herter
Montana Programmers KalispellUSMontana Programmers 1763Wes
Learn Code in LA Los AngelesUSLearners 1728Ivy Rueb
The Triangle Ruby Brigade (Triangle.rb) RaleighUSRubyists 1720Brandon Mathis
London Code Dojo LondonGBDevelopers 1717@sleepyfox
Holberton School San FranciscoUSSeahorses 1707Julien Barbier
Fog City Ruby Meetup San FranciscoUSRubyists 1692Stella Cotton
Turing Community Events DenverUSMembers 1682Jeff Casimir
Women Who Code Mexico City México CityMXCoders 1680Women Who Code
N-Languages New YorkUSN-langers 1679EVIE B0RTHWICK
Tech nights in Medellín MedellínCOMembers 1663Sebastian Miranda
Web Innovations- Houston HoustonUSMembers 1653Chen Sun of WebAndNet.com
Lehi Developers User Group LehiUSDuggers 1652Jeffrey Walter
Coded in Braam JohannesburgZATechies 1642Niel de Wet
Pittsburgh Agile (@PittAgile | #PittAgile) PittsburghUSAgilistas 1641Jon R. Stahl
Ottawa Ruby – we <3 programming OttawaCARuby Ninjas 1630Michael Prendergast
Open Source Hong Kong Hong KongHKMembers 1623Sammy Fung
Amsterdam.rb AmsterdamNLRubyists 1623Rayta van Rijswijk
Leeds Digital LeedsGBMembers 1623Natasha Sayce-Zelem
Quality Assurance New YorkUSMembers 1605Anthony Long
Boston Ruby on Rails Meetup Group BostonUSRails-ists 1601MG
Ruby Business (UK) LondonGBrubyists 1590Jairo Diaz
Delhi NCR Ruby Meetup Group DelhiINRubyists 1587Prabhat Gupta
Tech Talent South - Columbus ColumbusUSTech Tribe Members 1587Tech Talent South
Austin Software Engineers & App Developers AustinUSSoftware Engineers/Developers 1585Chris Requena
Rails Taiwan TaipeiTWrubyists 1569xdite
SF Front-End Developers: Experience Engineering San FranciscoUSExperience Engineers 1565Ahmad Ansari
Le Wagon Barcelona - Coding Bootcamp BarcelonaESfuture coders 1557Gus De Vita
Handy Tech Talks New YorkUSMembers 1546Eric David Benari
Le Wagon Bordeaux - Coding Bootcamp BordeauxFRApprentis 1535Bertrand
Ruby Hacknight - London LondonGBRubyists 1519Jairo Diaz
Porto Codes PortoPTVariables 1509Ricardo Mendes
Learn to Code - for Complete Beginners in San Francisco. San FranciscoUSCoders In Training 1494Andy Tiffany
Hacks/Hackers Atlanta AtlantaUSMembers 1470Hacks/Hackers
Codewords Pune PuneINCraftsmen 1467Karan Rai
Flatiron School Seattle Coding Community SeattleUSLearners 1454Emily Doyle
Developers Day powered by kariera.gr AthensGRFellows 1444kariera.gr
Polyglot.LA Los AngelesUSpolyglots 1441Polyglot.LA Organizer Team
RubyOn - Ruby On Rails - São PauloBRRubistas 1439Leandro Afonso
Jeddah Software Developers JiddahSADevelopers 1438Aaron Q. Johnson
NYC Ruby Women New YorkUSRubyists 1435Chrys Wu
Girls Coding Club HoustonUSCoders 1433Amanda Shih
NewHaven.IO New HavenUSTech Minded People 1431Tom Reznick
Landing Meetups LisbonPTMembers 1427Landing.jobs
The Brisbane Ruby and Rails BrisbaneAURuby/Rails developers 1425Nigel
Nola Hack Night New OrleansUSHackers 1406Cory Fabre
TOKYO Rails Meetup TokyoJPMembers 1405Leszek
YulDev MontréalCADev 1399Daniel LeBlanc
Paris Ruby Workshop ParisFRRubyistes 1399Victor Mours
Cleveland Agile Group (#CleAG) ClevelandUSAgilistas 1390Jon R. Stahl
BASE (Birmingham Alabama Software Enthusiasts) BirminghamUSSoftware Enthusiasts 1364David Lormor
B'more on Rails BaltimoreUSRubyists 1353Chris Strom
Python in Korea SeoulKRGeeks 1353Eric Kim Hoik
Advance in your career - Udacity London Meetup LondonGBUdacians 1329Andy Parker
NYC Apache Lucene/Solr Meetup New YorkUSLuceners 1328Grant Ingersoll
Denver.rb DenverUSrubyists 1326Jason Waldrip
Krakow Ruby Users Group (KRUG) KrakówPLRuby enthusiasts 1314Sebastian Bobrowski
Stockholm Ruby StockholmSERubyists 1313Martin Svalin
Enspiral Dev Academy Wellington WellingtonNZFriends of Dev Academy 1307Enspiral Dev Academy
The Sacramento Ruby Meetup SacramentoUSRubyists 1297Christopher Haupt
The jQuery Boston Meetup Group BostonUSMembers 1293Alessandra Rosenberg
Ruby Ireland DublinIERuby Irelanders 1288Declan
Medellín.rb MedellínCORubyists 1286Oscar Rendón
WebApp Builders - Fullstack Projects (LA Eastside) GlendaleUSWebApp-Builders 1280Kobi
Alchemy Code Lab PortlandUSAlchemists 1280Marty Nelson
Boulder Ruby Group BoulderUSRubyists 1272Marty Haught
ThoughtWorks Belo Horizonte Coding Dojos Belo HorizonteBRCoders 1272Adriano Lisboa
Graduate Developer Community LondonGBDevelopers 1262Barry Cranford
Le Wagon Rio de Janeiro - Coding Bootcamp Rio de JaneiroBRCoders 1262Fernando Americano
Arlington Ruby ArlingtonUSRubyists 1256Jim Gay
Montreal.rb MontréalCARubyists 1242Sophie Déziel
Orange County Ruby Users Group (OCRuby) IrvineUSRocking Rubyists 1237Forrest Chang
Code Fellows Seattle Meetup SeattleUSMembers 1232Code Fellows
SFBay Apache Lucene/Solr Meetup San MateoUSLuceners 1225Alea Abed
All Things API: Denver DenverUSAPI Aficionados 1195Monica Peotter
Le Wagon Lille - Coding Bootcamp LilleFRApprentis 1191François-Xavier Abraham
Full Stack Talks CarlsbadUSDesigners & Developers 1189Jeff Berg
[MumbaiRB] Mumbai Ruby Meetup MumbaiINRubyist 1182Bilal Budhani
SD Ruby (Ruby on Rails Enthusiasts) La JollaUSRubyists 1179Patrick Crowley
Los Angeles Hack Night Los AngelesUSHackers 1175Lance Lakey
Philly.rb PhiladelphiaUSRubyists 1172Ernesto Tagwerker
Full Stack PDX PortlandUSEntrepreneurs and Engineers 1172Chris Hough
Ruby Nuby™ New YorkUSNubies and Rubyists 1169Malcolm Arnold
Junior Developers Singapore SingaporeSGMembers 1167Michael Cheng
Bitnami Sevilla SevillaESbitcoders 1158Beltran
Le Wagon Melbourne - Coding Bootcamp MelbourneAUCreatives 1140Paal at Le Wagon Coding Bootcamp
Ruby Project Night NYC New YorkUSRubyists 1137Eric Collins
Miami Ruby Brigade MiamiUSRubyists 1121Bryce Kerley
Bogotá Ruby BogotáCODesarrolladores Ruby 1108Nathaly Villamor