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

See also

  • John 10, the tenth chapter of the Gospel of John