Isidore I of Constantinople | |
|---|---|
| Ecumenical Patriarch of Constantinople | |
| Church | Church of Constantinople |
| In office | 17 May 1347 – February or March 1350 |
| Predecessor | John XIV of Constantinople |
| Successor | Callistus I of Constantinople |
| Personal details | |
| Born | ? |
| Died | February or March 1350 |
Isidore I (Greek: Ἰσίδωρος; died February or March 1350) was the Ecumenical Patriarch of Constantinople from 1347 to 1350. Isidore Buchiras was a disciple of Gregory Palamas.