Arduino Store

store.arduino.cc
(European union, Italy, rest of the world)

Global

RS Components, Farnell/Newark, Mouser, Digikey

Europe

Austria: Physical Computing, Tigal, Watterott Electronic

Belarus: BuyDIYkit.com

Belgium: Tektonica, Antratek, iPrototype, Electroshop bvba, B-Electronix, MCHobby, Cotubex, Gotron

Bulgaria: Robotev, Erelement

Cyprus: Robotstore

Czech Republic: HW Kitchen, PV Electronic, CzechDUINO.cz

Denmark: MemeMaker, Let Elektronik, ElectroZone.dk, Helmholt Elektronik A/S

Estonia: ITT Group

Finland: Robomaa.com, Paeae Technologies, Månsteri Store

France: AlyaSoft, Lextronic, Zartronic, Snootlab, Jlectronique, RobotShop, Semageek, Arobose, Mechs, Evola, GenerationRobots, Alpha-Crucis, MatLog, Go Tronic, Passelec, Rhaaa la boutique, Electronique Diffusion

Germany: Segor-electronics (search for "Arduino"), Watterott Electronic, Elektronikladen | ELMICRO, TinkerSoup, reprap source,Antrax, EBG Darmstadt (search for "Arduino"),Fritzing Shop, Komputer.de, German RepRap Foundation, MKelectronics, exp-tech, embedded projects GmbH, Michael Zimmermann - Zimmermann Electronic Vert. GmbH, Tigal, Agile Hardware

Greece: Knowledge Research, Citistore, Internet Now!, GRobotronics, Robotstore

Greece Retail: INTERNET NOW!

Hungary: Fablabbudapest

Italy: Robot Italy, Eshopen, EtherMania, Regali e Desideri, Futura Elettronica, EmmeShop, Homotix, 7-three.com, RobotStore, ElettroShop, Robot Domestici, Lo spaccio di Nova, CampuStore, Plexishop Vectorealism

Italy Retail LED Elettronica , Milano
Siro Elettronica Via Renier 67, Torino
Femet Corso Grosseto N° 247/H, Torino

Latvia: Argus

Lithuania: BuyDIYkit.com, Modelis

Norway; ROBONOR, EHobby

The Netherlands: EZtronics, Turtle Creations, Machinecollective, Antratek, Doctor Bit, Freeduino.eu, FLORIS.CC, A-Blocks, Jee Labs, iPrototype, BRONTRONICS, Duinos, Extreme robots

Poland: KrisTech, Nettigo, Robo-Hobby, Smart Robots, KAMAMI

Portugal: Gtronica.com, InMotion, LusoRobótica, PTRobotics, Sonigate Leiritrónica, Systems4you, SAR, Leds&Chips

Romania: electronista, RoboFun, Mecatronica.EU, Teguna, ROROID

Russia: Linux Center, Amperka, Pacpac, Domit

Slovakia: elektromodely, RLX COMPONENTS, OK.SK

Slovenia: Tehnologija, Smak d.o.o.,

Spain: Libelium Cooking-Hacks, BricoGeek, e-lioness, TuxBrain, Cana Kit, Electan, Componentes Escobedos, OpenDomo, Voipminic, ardutienda, Microlog, Albacete Digital, Innova Didactic SL, Cetronic, ERA ROBÓTICA S.XXI S.L.U, Ro-botica Global, ELECTRONICA EMBAJADORES, S.L., Barcelona Cybernetics, Ingenieria de Microsistemas Programados, Conectrol, S.A., GoShield

Sweden: Electrokit, Lawicel, Kjell&Company, EZtronics

Switzerland: Dshop, Boxtec, Alpha-Crucis, Play-Zone

Turkey: Robit Teknoloji, Robomore, Yazki Bilism Hizmetleri, RoboWeb, EMPATEK BILISIM SAN. TIC. LTD. S, Robotistan

Ukraina: Digisoft, Parts, zubr.com.ua

United Kingdom: Cool Components, SK Pang electronics, oomlout, Robotiq, RobotBits, Proto-PIC, Earthshine Electronics, Hot Solder, Technobots, DTECH, Love Electronics, Domit, Active Robots Limited, Phenoptix, HobbyTronics, 4tronix, Rapid Electronics, , AB Electronics

The Americas

Argentina: DitenTec, Intek electronica, OpenHacks

Brazil: Multilogica, Unite, RoboCore, BuildBot, Laboratorio de Garagem, Foze

Canada: RobotShop , Lee's Electronic, SpikenzieLabs, Creatron Inc., Proto Advantage, Cana Kit, Solarbotics, eWerksonline, ABRA Electronics Inc., Canada Robotix, Aztec MCU Prototyping, DIIGIIT Robotics

Chile: Ingeniería MCI, Novachip

Colombia: Dynamo Electronics, Tienda de Robótica, ELECTRONICA I+D

CostaRica: Crcibernetica

Dominican republic: Robotech, PEDRO MEJIAS, Machetetech

Ecuador: Digytronic, APM MICRO, ICM Technology

Mexico: ElectroLabo, Pictronico, Cero-Uno, 5 Hz Electrónica, RoboDacta, Carrod Electrónica, ElectronicaEstudio, Sandorobotics, cosasdeingenieria, 330ohms, Madrigal Electronics, TechMake Electronics, Electronic Arte, AG Electronica

Panama: TecnoFutura

Peru: CreatividadAhora

Uruguay: Bluetip

USA: SparkFun, Maker Store, Adafruit Industries, Little Bird Electronics, Modern Device, FunGizmos, NKC Electronics, Gravitech, RobotShop, Liquidware, Hacktronics, MakerBot Industries, Microcontroller Pros, Curious Inventor, AeroQuad, CuteDigi, EIO, Teach me to make, UltiMachine, Electrojoystick.com, Electronics is Fun, AME - After Midnight Engineering, Trossen Robotics, Jameco, Zagros Robotics, Advanced Micro Circuits Corp, iHeartEngineering, 3D Robotics, Jaycon Systems, Elexp, Abra-electronics, Reuseum, Pololu, 411 Technology Systems, Handmadecircuits, ManyLabs, Epictinker, Woodman Studios, LLC, oddWires, Siliphi LLC, Karlsson Robotic, RadioShack, Banana Robotics, SuperDroid Robots

Middle East

Israel: Dash Electronics, 4Project, Or Electronics Solutions

Jordan: eshtre.com

Saudi Arabia: eshtre.com, Jazeerabotics

Asia and Pacific

element14

Australia: Little Bird Electronics, Toys Down Under, RobotGear, Australian Robotics, ProtoGEAR, Squarebit, Bilby CNC, Gorillabuilderz, The Life Automatic, Ocean Controls, Electron Hobbies, Sedonia Technologies

Bangladesh: SUMEET eShop

China: Seeed Studio Depot, DFRobot, Geeetech, OPEN JUMPER

Hong Kong: Self Built

India: Simple Labs, rhydoLABZ, 9 Circuits, PearlLabs, Cat Systems,Tenet Technetronics, Explore Labs, MG Super LABS, SUMEET Instruments, Protocentral, Ardour Labs, Fab.to.Lab, Bit.gen.in

Indonesia: Gerai Cerdas, Famosa Studio, Digi-Ware, Zaada Tec, Delta Electronic

Japan: MechaRoboShop, Switch Science, Strawberry Linux, Techand, MicroFan, Kyohritsu, TechShare, Androciti

Korea: Plug House, MakeZone, ArtRobot, Eleparts, JK Electronics, Hanjindata, INIPRO, Keytronics Lab Co.

Malaysia: Homebrew & Technology, Rocket Scream, E-Shore Technologies, Masa Cipta, Cytron Technologies Sdn Bhd

New Zealand: Co-Lab, MindKits, nicegear, Robotronic, Protoneer.co.nz, Sedonia Technologies

Philippines: Relix Technologies, Dynamodo, PC Options

Singapore: sgBotic, Robot R Us

Sri Lanka: Fab.to.Lab

Thailand: Thaiduino, ThaiEasyElec

Taiwan: PlayRobot, ARoboto, ICshop

Vietnam: Sotatec

Africa

Egypt: Future Electronics Egypt, Egyrobots, Ram Electronics

Kenya: Nerokas Online Store

South Africa: Netram Technologies, Yebo Electronics, Micro Robotics, HobbyTronics, Communica

Tunisia: Digi Freaks, Ast Group

Nigeria: Satajanus Bots