Leblanc is a woodwind instrument brand whose lineage traces to Ets. D. Noblet, founded in 1750 in La Couture-Boussey, France. The firm passed to Georges Leblanc in 1904 after the last Noblet heir died, and his son Léon Leblanc — a Paris Conservatoire prizewinning clarinetist — shaped the company's identity around acoustical and mechanical refinements to the clarinet. U.S. distribution began in 1921, and after World War II Léon Leblanc partnered with Vito Pascucci to establish the G. Leblanc Corporation in Kenosha, Wisconsin, which became the brand's American manufacturing and distribution hub. The company was acquired by Steinway's Conn-Selmer subsidiary in 2004, and the French clarinet plant was later sold to Buffet Group in 2008.

Leblanc is best known for clarinets, having produced a long line of professional models including the Symphonie, Sonata, Concerto II — designed in collaboration with jazz clarinetist Eddie Daniels — and the Opus II, developed with Larry Combs. The Bliss line, released in 2009 in partnership with Morrie Backun and soloist Julian Bliss, brought a Backun-influenced design language to the catalog. Under Conn-Selmer the brand has refocused on student and intermediate instruments, with the Serenade and Debut soprano clarinets anchoring the active lineup. The broader catalog also covers oboes, English horns, bassoons, flutes, piccolos, saxophones, and woodwind accessories.

The brand's reputation rests heavily on its mid-20th-century jazz and orchestral following. Pete Fountain played large-bore Leblanc clarinets associated with the open, projecting New Orleans sound, and Buddy DeFranco was among the high-profile jazz endorsers of the Kenosha era. Leblanc brasswind production was discontinued in 2007, leaving the brand's identity centered on the woodwind heritage it has carried since the 18th century.

LeBlanc has 15 products cataloged on Equipboard, including Clarinets, Trumpets, and Mutes. Their gear is featured by 3 artists, with the strongest followings in Jazz, Classical, and Rock. Notable users include Chris Botti, Wenzl McGowen, and Winton Marsalis.