Rudolf I may refer to:

• Rudolf I (bishop of Würzburg) (died 908)
• Rudolph I of Burgundy (859–912)
• Rudolf I, Margrave of the Nordmark (d. 1124)
• Rudolph I, Count Palatine of Tübingen (1160–1219)
• Rudolph I, Bishop of Schwerin (died 1262)
• Rudolf I, Margrave of Baden-Baden (1230–1288)
• Rudolf I of Germany (1218–1291)
• Rudolf I, Duke of Bavaria (1274–1319)
• Rudolf I of Bohemia, (c. 1281 – 1307)
• Rudolf I, Margrave of Hachberg-Sausenberg (died 1313)
• Rudolf I, Duke of Saxe-Wittenberg, (c. 1284 – 1356)
• Rudolf II, Holy Roman Emperor (1552–1612), who was also Rudolf I of Hungary

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