| Honorific-Prefix: | Mar |
| Shimun XI Eshuyow | |
| Church: | Chaldean Catholic Church Church of the East |
| See: | Qodshanis of the Chaldeans Holy Apostolic See of Seleucia-Ctesiphon |
| Patriarch Of: | Patriarch of the Chaldeans Patriarch of the Church of the East |
| Residence: | Qodshanis, Ottoman Empire, then later moved to Khosrau-Abad near Salmas, Safavid Empire |
| Enthroned: | c.1638 |
| Ended: | 1656 |
| Death Date: | 1656 |
Mar Shimun XI Eshuyow was the sixth Patriarch of the Chaldean Catholic Church, from 1638 to 1656.
He succeeded Patriarch Shimun X Eliyah, The seat of the patriarchate of Babylon of the Chaldean Catholic church being in Salmas during his reign.
Mar Shimun XI Eshuyow like his predecessor Shimun X Eliyah was not formally recognized by Rome, after the hereditary Shimun line of Patriarchs was reintroduced by Patriarch Shimun IX Dinkha. Hereditary succession is an unacceptable practice by the Roman Catholic Church.
His successor was Shimun XII Yoalaha (1656–1662).