Kastel may refer to:

• Kastel, a village in Sevlievo Municipality, Gabrovo Province, Bulgaria.
• Kaštel, a village in Istria County, Croatia
• Kaštela, Split-Dalmatia County, Croatia
• Mainz-Kastel, district of Wiesbaden, formerly the city of Kastel until its incorporation into Wiesbaden, Germany on August 10, 1945
• Al-Qastal, an Arab village and strategic point in the 1948 Arab-Israeli war

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