Jenco Musical Products was a percussion instrument manufacturer based in Decatur, Illinois. The company traces its origins to the Leedy mallet instrument division, which was acquired by Grover C. Jenkins (G. C. Jenkins Co.) after Conn divested itself of Leedy-Ludwig; the Jenco name is derived from Jenkins's surname.

The company built a catalog centered on mallet and tuned percussion, including xylophones, marimbas, vibraphones (originally marketed as 'vibrabells'), glockenspiels, orchestra bells, celestas, celestettes, tubular chimes, and timpani. Early Jenco instruments shared design features with Leedy and were built to a professional standard, while later production shifted toward more affordable student-grade instruments aimed at school music programs.

Jenco ceased operations in the early 1980s, after which the line was taken over and rebranded as Decatur before that successor also wound down. Jenco mallet instruments remain in circulation on the vintage market, where the brand is remembered for its celestes and vibraphones in particular.

Jenco has 3 products cataloged on Equipboard, including Portable & Arranger Keyboards and Vibraphones. Their gear is featured by 2 artists, with the strongest followings in Rock and Pop. Notable users include Randy Seol and Danny Federici.