Ludwig Halberstädter (9 December 1876, in Beuthen, Oberschlesien – 20 August 1949) was a German-Jewish radiologist.
In 1901 he obtained his medical doctorate from the University of Breslau, and following graduation became an assistant to surgeon Carl Garré (1857–1928) at the University of Königsberg. Afterwards he returned to Breslau as an assistant to dermatologist Albert Neisser (1855–1916), under whose direction he participated on a medical research mission to Java (1907).