K·B Toys (also known as Kay Bee Toys) was an American chain of mall-based retail toy stores. The company was founded on April 1, 1922 in Pittsfield, Massachusetts as Kaufman Brothers, a wholesale candy store. The company opened a wholesale toy store in 1946, and ended its candy wholesales two years later to emphasize its toy products. Retail sales began during the 1970s, using the name Kay-Bee Toy & Hobby. Its chief rival is Toys "R" Us.
In 1999, the company operated 1,324 stores across the United States of America and was the second-largest toy retailer in the U.S., but it later declared bankruptcy in both 2004 and 2008 before going out of business on February 9, 2009. The company operated 461 stores at the time of its closure. International retailer Toys "R" Us acquired the remains of K·B Toys, consisting mainly of its website, trademarks, and intellectual property rights. Strategic Marks, a company that buys and revives defunct brands, purchased the brand in 2016, and planned to open new stores using the name beginning in 2019; plans for this revival, however, were cancelled due to a lack of funding. As of 2020, all trademarks for K·B Toys have been abandoned by Strategic Marks and is currently not used by any company as of 2023.
K·B Toys was one of the retailers for Transformers toys when it still exists and it have some exclusive Transformers toys there.