Constantine I, Prince of Armenia
| Constantine I Կոստանդին Ա | |
|---|---|
| Lord of Cilicia | |
| Lord of Armenian Cilicia | |
| Reign | 1095 – c. 1100 |
| Predecessor | Roupen I |
| Successor | Thoros I |
| Born | 1045–50 |
| Died | 1102/1103 |
| Burial | Monastery of Castalon |
| Spouse | An unnamed great-granddaughter of Bardas Phokas |
| Issue | Thoros I Beatrice Leo I |
| House | Roupenians |
| Father | Roupen I |
Constantine I or Kostandin I (Armenian: Կոնստանտին; 1035–1040 – c. 1100) was the second lord of Armenian Cilicia from 1095 to until about 1099.