John X may refer to:

• Pope John X (r. 914–928)
• John X (archbishop of Ravenna) (r. 983–998)
• John X bar Shushan (r. 1063/1064–1072/1073)
• Pope John X of Alexandria (r. 1363–1369)
• John X of Antioch (Greek Orthodox, r. 2013–present)
• John X of Schleswig-Holstein-Gottorp

Topics referred to by the same term

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