Johann I

Johann I may refer to:


 * Johann I Josef, Prince of Liechtenstein (1760–1836)
 * Johann I, Duke of Opava-Ratibor
 * Johann I, Count Palatine of Simmern
 * Johann I, Count Palatine of Zweibrücken
 * John, Elector of Saxony (1468–1532), John the Steadfast
 * Johann, Count of Cleves
 * Johann, Count of Coronini-Cronberg
 * Johann, Count of Pálffy
 * Johann, Count von Aldringer
 * Johann, Count von Werth
 * Johann, Elector of Brandenburg
 * Johann Strauss I
 * Johann, Baron von Appel
 * Johann I, Count of Habsburg-Laufenburg-Rapperswil (* around 1295/97, † 1337)
 * Johann Adolf I, Duke of Saxe-Weissenfels