The Jackson Guldan Inc. (Columbus, Ohio) was a musical instrument manufacturer active in the first half of the 20th Century. In the early 1900s Jackson Guldan used carving machines to make cheap violins enabling it to compete with the German trade violin industry. The disruption to trans-atlantic trade caused by World Wars I and II enabled Jackson Guldan to become the largest factory producer of violins in the USA at that time.  As trade with Germany resumed in the 1950s, Jackson Guldman could no-longer compete with the cheaper German imported violins.

Jackson Guldman also made guitars which were sold under various brand names including Champ, Chris, Blue Suede, Jay and Mercury. A common Jackson Guldman model is the Adjustomatic guitar - the necks were attached by a single screw and were adjustable by way of a bolt which raised or lowered the action.