Josef Aloys Frölich or Alois von Frölich (10 March 1766, Marktoberdorf – 11 March 1841) was a German doctor, botanist and entomologist. He is not to be confused with Franz Anton Gottfried Frölich (1805–1878), his son, also an entomologist but specialising in Lepidoptera.
In the field of botany he described many species within the genus Hieracium. The genus Froelichia (family Amaranthaceae) is named in his honor.