Plus some Swapmeets and Fleamarkets too!

• Active Surplus Electronics - 345 Queen Street West, Toronto, ON M5V 2A4, Canada
  • Tons of random stuff all over the place. A little unorganized but the staff seems to know where 99% of there stock is. Great for finding items for your projects that you didn't even know you needed.

• Circuit Specialists - Circuit Specialists
• Electronicfest - Computers and electronics by Troop 446 http://www.scoutscomputerswapmeet.com

• Elliott Electronic Supply - 1301 South Tyndall Avenue, Tucson, AZ 85713-1725 - (520) 884-7394
  • Lots of parts, supplies, DMMs, project boxes, irons, tips, wire, headers, plugs, solar panels, etc…
  • Helpful and knowledgeable staff
• Southwest Liquidators (not sure if it's still open) - 6951 South Park Avenue, Tucson, AZ 85756-6918 - (520) 747-2083 website
  • They buy surplus stuff from companies, so it's a touch hit-or-miss when looking for specific parts that are there or that work
  • Inventory varies, but they typically carry supplies, scopes, irons, file cabinets, desks, chairs… you name it, they probably have one

• Advanced Component Electronics (ACE), San Jose, CA - http://www.acecomponents.com/
  • The biggest selection of 74XX series logic ICs I have ever seen in one place. Lots of passives too.
• Excess Solutions, Milpitas, CA - http://www.excesssolutions.com/
  • A dozen long aisles of surplus components. Huge selection of passives, IC's, lots of connectors, tiny screws and other hardware.
• Fry's Electronics, Sunnyvale, CA - http://frys.com/
  • Not surplus but still a cheap source for misc. electronics items. I always stop here on the way home from HSC. They have cheap aluminum enclosures and tips for Weller soldering irons. Oh, and all the computer hardware you could ever want.
• Halted Specialties (aka HSC), Santa Clara, CA - http://halted.com/
  • My favorite place to find electronic components, period. Possibly because I know where to find things. I've been shopping here for over 15 years.
• Weird Stuff Warehouse, Sunnyvale, CA - http://www.weirdstuff.com/
  • Weekly bid sales, lots of cool surplus equipment in the back part of the store.

• ASVARO Electronics Flea Market, Cupertino, CA - http://www.electronicsfleamarket.com/
  • This swap meet has been a silicon valley staple for many years. Lots of deals on test equipment, surplus junk, and tools if you come early enough. Runs from March to October.

• C&H Surplus, Duarte, CA - http://candhsurplus.com/
  • Lots of excellent surplus electronic and scientific stuff, reasonably priced, friendly owner (cash/check only)
• W6TRW Swap Meet, Redondo Beach, CA - http://www.w6trw.com/swapmeet/swapmeet.htm
  • This swap meet has been held every last Saturday of the month since the 1960's. Historically a ham radio swap meet it now includes a wider range of electronics including computer and industrial surplus.
• All Electronics, Van Nuys, CA - http://www.allelectronics.com/
  • Used to have a second store which has been closed since the early 2000's. Everything in their catalog and more is available at their store.
• Apex Electronics, Van Nuys, CA - http://www.apexelectronic.com/
• M&K Metals, Hawthorne, CA - http://www.mkmetal.net/
  • Good source of scrap metals, open on Saturday! (until 1 pm)
• Industrial Liquidators, Lawndale, CA - http://industrialliquidators.com/ - CLOSED
  • Note that their San Diego store is still open.

• California Electronics - 221 N Johnson Ave, El Cajon, CA 92020
  • Haven't been in a few years. They used to have a lot of random electronics bits in the back of the store. Some new components as well, stuff like knobs, switches, and LEDs.
• Industrial Liquidators, San Diego, CA - http://industrialliquidators.com/
  • I haven't been back since I left the area 6 years ago. Used to have lots of mechanical components like gauges and valves, some electronics. They were selling electric bike kits for a while.
• Murphy's Surplus, El Cajon, CA - http://www.murphyjunk.bizland.com/
  • Haven't been in a few years. Lots of surplus military stuff.
• Gateway Electronics - CLOSED
  • They still have a store in Missouri and a website at http://www.gatewaycatalog.com/

Another good list of California electronics surplus stores: http://www.bluefeathertech.com/technoid/calswapindex.html

• J.B. Saunders - 4700 Sterling Drive, Boulder, CO 80301, http://jbsaundersco.com/
  • From vacuum tubes to SMT parts with everything in between, plus nice tools and instruments. Surplus SMT RCL full reels - cheap if you know how to negotiate (hint: bring cash).

• Astro Too Surplus Electronics, 6949 West Nasa Boulevard, Melbourne, FL 32904, http://astrotoo.com
• Panik's Electronics-N-Surplus, 5060 Industry Drive, Melbourne, FL 32940, panikelectronics.com

• Skycraft Parts & Surplus Inc‎, 2245 West Fairbanks Avenue, Winter Park, FL, skycraftsurplus.com
• BPB Surplus, 1967 High Street,Longwood, FL 32750,bpbsurplus.com
• Tech Surplus Depot, 215 Pineda Street, Longwood, FL 32750, http://www.technologysurplusdepot.com/

• Marlin P. Jones & Assoc, Inc. - 1133 Old Dixie Highway, Lake Park, FL 33403, http://www.mpja.com/
• Florida Breaker and Electrical Liquidators, 837 SW 17th Ave, Delray Beach, FL, 33444, http://www.flbreaker.com/

• American Science & Surplus (ASS); Chicago, IL; Geneva/West Chicago, IL; Milwaukee, WI - http://www.sciplus.com/
  • Communications & Electronics, Containers, Drives & Wheels, Electrical Parts, Lab Supplies & Equipment, Lamps, Sockets & Wiring, Motors, Blowers & Pumps, Optics

• “Ax Man” has 4 locations in the Twin Cities area. They have more than just electronics. http://www.ax-man.com/

• “The Black Hole” (Los Alamos Sales Company), Los Alamos, NM - http://blackholesurplus.com/
  • If you are interested in surplus electronics or Cold War era atomics research equipment, you must go here at least once. It's like a vintage electronics museum where most things are for sale.

• NYC Resistor maintains a wiki that contains several sources for parts and materials in the NYC area
  • http://wiki.nycresistor.com/wiki/Local_Resources_/_Parts

• Philcap Electrionics - http://www.philcap.com/

• Electronics Surplus - http://www.electronicsurplus.com/

• Norvac - http://www.norvac.net/
  • Also stores in Salem and Eugene. Not so much surplus, but a great inventory of parts for hobbyists and engineers making any type of electronic prototypes.

• Surplus Gizmos - http://www.surplusgizmos.com/
  • Online list is a tiny sample of what they have in the store. Stock is almost entirely surplus from local electronics companies. Reels of resistors and capacitors priced by the foot. Usually lots of Oregon Scientific customer returns.

• Cascade Surplus - http://www.cascadesurplus.com/
  • Way out at 17954 SE Division St, but looks like they have some good stuff, including heavy-duty switches like you'd use for a stomp box.

• Tanner Electronics, Carrollton, TX - http://www.tannerelectronics.com/
  • Not set up for web or online inventory, this is a store you have to walk around. Electronic tools, kits, hardware, adapters, jacks, sockets, semiconductors, cheap speakers + wire, motors, steppers, odd and neat surplus parts for robots, radio, or audio.
  • Good place to look for old transistors and opamps, occasional NOS Ge diodes. Anyone into building or fixing gear with obsolete parts should make a visit.
• BG Micro, Garland, TX - http://www.bgmicro.com/
  • Similar in spirit to Tanner's (the owners are friends), just geared towards the web. While it can be found on a Google map search, they are not set up with a normal storefront and will be far easier to deal with online. Not recommended as a shopping destination, but if you want to pick up your order in person they are very nice about it (pls call ahead). They are a busy surplus business using every square foot for inventory, so it can be alarming if you show up expecting a nice fancy lobby.
• Altex Electronics, Carrollton, TX - http://www.altex.com/
  • Surplus would be mostly in the small amount of electronic components such as resistors, capacitors, potentiometers, dip sockets in various bulk boxes at nice prices
  • rest of inventory is geared toward maintenance tech supplies, crimpers, punchdown tools, server rack hardware, with a soldering tools section rivaling Fry's.

(thanks to @vonnieda)

• Vetco Electronics - http://vetco.net/
  • Vetco specializes in Electronic Components, Home Theater Audio and Video cables (HDMI, Component, Coaxial, Speaker Wire, Etc.), Wall Plates, TV and Projector Mounts, Wire and Cable, Adapters, Cables and Connectors, Semiconductors, IC's, Resistors, Capacitors, LED's, Chemicals, Tools and Test Equipment.

LadyAda of Adafruit Industries has a list of places to find parts, many of which are duplicated here.

EMSL also maintains a list of links to places where you can find Surplus Electronics.

NYC Resistor maintains a wiki that contains several sources for parts and materials in the NYC area.

Another good list of California electronics surplus stores.

Dated list of surplus shops in Silicon Valley, Orlando, New Mexico: http://www.telltronics.org/travel.html