Described as a "Sharper Image for sysadmins," ThinkGeek's merchandise, which caters to geek culture, has been likened to "toys for adults, novelties designed to appeal to both your inner child and your inner grad student." These include clothing, electronic and scientific gadgets, unusual computer peripherals, office toys, pet toys, child toys, and caffeinated drinks and candy. ThinkGeek was founded in 1999 and is owned by Geeknet.

Headquarters are located in Fairfax, Virginia.