Barclay is a vintage guitar brand name that appeared on budget-tier instruments distributed in North America from roughly the 1950s through the 1970s. Rather than a manufacturer in its own right, Barclay operated as a badge brand: batches of guitars, drums, amplifiers, and ukuleles were sourced from various factories and rebranded for distributors, with the "Barclay" spelling used in the United States and "Barcley" often appearing on instruments sold into Canada.

Early Barclay-branded guitars were typically built in the USA by Harmony in Chicago, alongside that factory's better-known Silvertone, Stella, and Airline output — including simple parlor guitars and archtops sharing Harmony model numbers such as the H162 and H1143. By the 1960s, production had largely shifted to Japan, with instruments attributed to builders including Teisco/Kawai, Matsumoku, and Guyatone. The lineup from that era included thinline archtop electrics like the Teisco-built EP-9T and offset solidbodies such as the Barclay Bison.

The instruments were aimed at beginners and casual players, generally featuring shorter scale lengths, laminated woods, and simple hardware. Barclay is not an active manufacturer today, but its guitars circulate on the vintage market as affordable examples of mid-century American and Japanese budget production, with some models (notably the Harmony-built flat-tops) occasionally used as platforms for luthier conversions.

Barclay has 4 products cataloged on Equipboard, including Solid Body Electric Guitars. Their gear is featured by 1 artist, with the strongest followings in Rock and Blues. Notable users include Adriano Viterbini.