Ludwig Koch is the name of:
Ludwig Koch (painter) (1866–1934), Austrian equestrian painter Ludwig Carl Christian Koch (1825–1908), German entomologist and arachnologist Ludwig Koch (sound recordist) (1881–1974), German-born British broadcaster and wildlife sound recordist Ludwig Koch, father of kidnap victim Natascha Kampusch
See also Carl Ludwig Koch (1778–1857), German entomologist and arachnologist