Dr. Thomas Stockmann, Medical Officer of the Municipal Baths.
Mrs. Stockmann, his wife.
Petra
(their daughter) a teacher.
Ejlif & Morten
(their sons, aged 13 and 10 respectively).
Peter Stockmann
(the Doctor's elder brother), Mayor of the Town and Chief Constable, Chairman of the Baths' Committee, etc. Morten Kiil, a tanner
(Mrs. Stockmann's adoptive father).
Hovstad, editor of the "People's Messenger."
Billing, sub-editor.
Captain Horster.
Aslaksen, a printer.
Men of various conditions and occupations, a few women, and a troop of schoolboys--the audience at a public meeting.
The action takes place in a coastal town in southern Norway.