Johann Heinrich Hartmann Bätz (1 January 1709 – 13 December 1770) was a Dutch organ builder.
He erected other organs of similar magnitude in the large churches of Gorinchem, Utrecht, Woerden, Benschop, etc.
His sons Gideon (1751-1820) and Christoffel (1755-1800), who lived their entire life in Utrecht, succeeded their father in the business.
After Johann Heinrich Hartmann Bätz died, his family kept the company alive.
In 1849 Christian Gottlieb Friedrich Witte took over the company; he had been working with the Bätz family since 1827.