Campanus can refer to:
Giovanni Antonio Campani called Campanus (1427–1477), Italian humanist Campanus of Novara (1220–1296), Italian astrologer, astronomer, and mathematician; also: Campanus (crater), a lunar crater named for him the astrological house system named after him; see House (astrology)#Campanus Johannes Vodnianus Campanus (1572–1622), Czech humanist, composer, pedagogue, poet, and dramatist Johann Campanus (fl. 1530) Belgian Anabaptist religious reformer Campania, a region of Italy
See also John Campanius (1601–1683), Swedish Lutheran clergyman