Siegfried IV may refer to:

• Siegfried IV von Algertshausen, Prince-Bishop of Augsburg in 1286–1288
• Siegfried IV, Count of Northeim-Boyneburg and Homburg

• Steven byington
• Steven Caethoven
• Steven Cage
• Steven Callahan
• Steven Campbell
• Steven Campbell (artist)
• Steven Campbell (footballer)
• Steven Campbell Moore
• Steven Cannell
• Steven Carlton
• Steven Carriere
• Steven Carrington
• Steven Carroll
• Steven Cassidy
• Steven Cavanagh
• Steven C. Beering
• Steven C. Booth
• Steven C Clemons
• Steven C. Clemons
• Steven Cerio
• Steven cerio
• Steven C. Gunderson
• Steven Chabot
• Steven C. Hackett
• Steven Chapman (cricketer)