Hal Leonard is the world's largest sheet music publisher, founded in 1947 in Winona, Minnesota by Harold "Hal" Edstrom, his brother Everett "Leonard" Edstrom, and musician Roger Busdicker. The company name combines the brothers' first names — "Hal" from Harold and "Leonard" from Everett — originally used for a dance band they formed in the late 1930s. What began as a small operation arranging popular music for school bands grew into a global music publishing operation headquartered in Milwaukee, Wisconsin, with offices across Europe, Asia, and Australia.

The company's catalog spans over one million titles sold in more than 65 countries, encompassing sheet music, songbooks, method books, instructional videos, and reference materials for virtually every instrument. Flagship publications include the Essential Elements method series for band and strings, Faber Piano Adventures, and the Rubank Elementary Method. Hal Leonard also pioneered digital sheet music distribution with SheetMusicDirect.com, launched in 1997, and operates platforms like Noteflight (music composition software) and Groove3 (music technology training).

Beyond publishing, Hal Leonard serves as a major distributor of musical instruments, accessories, pro audio gear, and software to music retailers worldwide. Distributed brands include Gibraltar hardware, Paiste cymbals, Remo percussion, Avid (Pro Tools, Sibelius), IK Multimedia, Morley pedals, Hotone pedals, Snark tuners, and many others.

Hal Leonard has 3 products cataloged on Equipboard, including Music Lessons and Instruction, Portable & Arranger Keyboards, and Whistles.