Kreuzburg and Kreutzburg are German place names meaning "cross castle" and may refer to:

• Kreuzburg, a village in the municipality of Groß Pankow (Prignitz), Germany
• Kreuzburg, the German name for a town in the former East Prussia, today Slavskoye, Russia
• Kreuzburg an der Bistritz, the German name for Piatra Neamț, Romania
• Kreuzburg O.S., the German name for Kluczbork, Poland
• Kreutzburg, the medieval name for the northern section of Jēkabpils, Latvia