Dr. Thomas Stockmann Medical Officer of the Municipal Baths.
Mrs. Stockmann His wife.
Petra Their daughter, a teacher.
Ejlif and Morten Their sons, aged 13 and 10, respectively.
Peter Stockmann The Doctor's elder brother and Mayor of the Town and Chief Constable, Chairman of the Baths' Committee.
Morten Kiil A tanner and Mrs. Stockmann's adoptive father.
Hovstad Editor of the "People's Messenger."
Billing Sub-editor of the "People's Messenger."
Captain Horster An old friend of Dr. Stockmann.
Aslaksen A printer.