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Mar Shimun XIII Dinkha was Patriarch of the Chaldean Catholic Church carrying the title Patriarch of Babylon between 1662 and 1692 in communion with Rome and residing in Khosrau-Abad near Salmas. He was the last in the hereditary Shimun line of Patriarchs in the Chaldean Catholic Church and, like his predecessors Shimun X Eliyah (1600–1638), Shimun XI Eshuyow (1638–1656) and Shimun XII Yoalaha (1656–1662), was allegedly not officially recognized by Rome since the Catholic church does not approve of hereditary patriarchates.

In 1692, Patriarch Shimun XIII moved the seat of his patriarchate to Qochanis (modern-day Konak, Hakkari), broke communion with Rome and became Patriarch of the Assyrian Church of the East, continuing the Shimun hereditary line of Patriarchs in the Assyrian church instead, a tradition that continued until the death of Patriarch Shimun XXI Eshai in 1975.

Patriarch Shimun Dinkha died around 1700 AD and was succeeded in the Assyrian Church of the East by Shemʿon XIV Shlemon.

See also

• List of Chaldean Catholic patriarchs of Babylon
• List of patriarchs of the Church of the East
• List of patriarchs of the Assyrian Church of the East